Emma's new classmate Nina is accused of theft. Together with her fellow student Max, Emma sets out to search for clues.

Max is being blackmailed by drug dealer Dragan and is forced to sell "Happy Pills" at school. Henri senses another case and falls under suspicion himself.

Nina and Emma get robbed. When they confront the thief, they see how she lives at home. Meanwhile, the Pfefferkörner (Peppercorns) discover that Nina is also hiding something.

Emma and Max find a suitcase with a pair of sneakers in the bulk waste. Shortly after, there is a break-in at the Krogmanns' house and Henri's dog Feline disappears.

The Sudanese girl Acai helps Henri after a fall, but then disappears with Emma's bicycle. The Peppercorns observe her selling illegal cigarettes with her mother.

The Peppercorns suspect blackmail: A female classmate was filmed while changing in the school locker room and is now being asked to pay money to prevent the video from being posted on the internet.

Henri's mother is visiting and wants to take her son with her to Africa. When Henri discovers smuggled ivory, he ventures on a dangerous solo mission.

Ben has supposedly composed the perfect song for Nina. Using a clever plan and sophisticated technology, Nina, Emma, Max, and Henri lure music dealers into a trap.

A pub owner sees Grandma Leni as competition. Her customers are scared away and the next day her food truck disappears. The Peppercorns set out to search for it.

Grandma Leni is hospitalized and gets robbed there. To avoid worrying her even more, Max doesn't call the police but instead sets out with the Peppercorns to search for the thief.

Matteo is suspected of stealing the school's donation box. The Peppercorns want to prove his innocence. In doing so, they receive help from boxer Henry Maske.

The flower beds for the competition "Germany's Most Beautiful School Garden" have been vandalized. Is someone trying to take revenge on Nina's father? Emma's trail leads to a houseboat.

Henri discovers radioactively contaminated tea in the headquarters. Nobody believes him. But then Henri gets kidnapped. Meanwhile, Nina wants to improve her relationship with Max.

After Emma and Henri have emigrated, Nina and Max find two new Peppercorns in Jessi and Luis. Together they help homeless people who are about to be driven out of the HafenCity.

School life is being disrupted by malicious pranks. The school principal is also being threatened. Is a former student who was expelled from school behind it?

Jessi falls in love with her hip-hop teacher Chuoc at the youth center. When she realizes that he is involved in criminal activities, it seems to be already too late.

The Peppercorns discover that pills are being switched among residents in the senior home. Nina's former neighbor is also affected. Max observes the nursing staff.

Jessi is supposed to catalog stuffed animals for a job. But thieves use her key to gain access to the villa. Is a handyman behind the theft?

Max sneaks into a club that films dangerous dares for the internet. He puts himself in danger, and then Nina also wants to take a break from their relationship.

Grandma Leni's historical cookbook containing the original recipe for currywurst has been stolen. The Peppercorns suspect Fish-Heini, but then Luis disappears.

An angel statue is stolen from the cemetery. The Peppercorns investigate the von der Hagen sculptor family and research the topic of occultism.

Is Max's friend a neo-Nazi and involved in an attack on Nina's brother? The Peppercorns investigate in the environment of a group of right-wing radical youth.

Luis has a new hobby: treasure hunting using GPS. In the process, he gets locked in a tunnel system with Jessi and Feline. Can Max and Nina help their friends in time?

Max has a new girlfriend. Luis and Jessi try to support Nina. She loses her theater role and falls under suspicion of having poisoned her rival.

The Peppercorns investigate an unappetizing case. An endangered snake is supposed to be eaten as a delicacy. Meanwhile, Luis receives a visit from his father.

Dog Feline becomes sick after running across a construction site. A hotel design by Jessi's father is supposed to be built there. Was toxic waste illegally disposed of here?

Nina has to move to Italy with her family. Saying goodbye to Max and her friends is difficult for her. But then the Peppercorns have to catch a pickpocket.

Jessi has a hard time with new Peppercorns. But when her classmate Jiao disappears, Luis convinces her to investigate with Niklas, Anton, and Ceyda.

The Peppercorns support Jessi during climbing training. Suddenly they are threatened. A photo leads to the blackmailers who make money with criminal sports betting.

Niklas is afraid: His mother is suspected of theft. The Peppercorns want to prove the mother's innocence. They suspect the real perpetrator is at the campground.

Luis' dog Feline suddenly becomes very ill: She ate poisoned dog bait in the park. The Peppercorns set out to find the perpetrator.

Ceyda is offered cheat sheets for a school dictation. She gets filmed and is blackmailed with the footage: Ceyda risks being expelled from school. Jessi is also keeping a secret.

Anton is desperate: A classmate falsely claims that Anton attacked him. He needs the help of the other Peppercorns - but they are distracted.

On Alex and Isabell's wedding day, there is great excitement. Luis is in the hands of arms dealers. And Erol and Anton are suspected of being connected to terrorists.

While Niklas is suspected of stealing jewelry at a party, Ceyda only has eyes for her big crush Ivo. Does he have anything to do with the thefts?

Grandma Leni was given counterfeit money, now she fears for her livelihood. Niklas soon has a suspect, but this also puts him in a dilemma.

The Peppercorns are searching for stolen strollers. Then Niklas' mother Janin disappears. Is there a connection?

At the boat storage facility, a customer's yacht is stolen. The insurance company refuses to pay, and Erol's existence is at stake.

While wedding preparations for Isabell and Alex are underway, there's a break-in at the headquarters. The Peppercorns try to investigate without the bride and groom noticing.

Tali is threatened. A stumbling block flies through the window at her house. That gets the peppercorns on the scene.

Clari has a suspicion: 5 million euros are hidden in the port. When the friends realize it, it's almost too late.

Lou and Pippa find the perfect HQ - but Rafa only agrees when they find his mother's laptop.

Pippa is involved in the bee club. After a brutal arson attack, eleven bee colonies have been wiped out.

Jet's bike disappears. While searching, the peppercorns uncover a spectacular scam on senior citizens.

Rafa believes his father is a criminal. The PK are investigating the case of a blind American woman who was robbed.

Stolen chocolates and a tied up girl in the chocolate museum bring Milan and Pepper to the scene.

Sven is said to deal in drugs; he only wanted to help his brother. The PK want to prove his innocence.

Lou's godmother Jenny, who works as a hostess on a cruise ship, docks in the port of Hamburg.

Pippa is meanly attacked by her classmates Edda and Benni in the schoolyard.

Instead of lotus silk, Jet's mother is sent rag dolls in which the PK find live baby turtles.

Milan finds dead bats and abandoned quarters in a new construction project. Who wants to get rid of the animals?

Eva is €15,000 in debt. Her online store account has been hacked. Who is behind this?

Underage Vietnamese women work in a nail salon for a pittance. The peppercorns reveal.

Milan and the dog Pepper accidentally meet an unscrupulous puppy dealer. Then Pepper disappears.

New team, new case: Jasina has found something with the detector in an abandoned factory and is knocked out. beaten.

Moritz's father is arrested for dealing in cocaine. But there is something fishy about it: the cocaine is nothing but flour.

After a color attack on Djamila's snack bar, a lead leads the peppercorns to the youngsters of HSV.

Leo sells her bike to a shady guy when the police shows up. She escapes and is acting very strange.

Who played online poker illegally with Mira's ID? This time the peppercorns are investigating undercover in the outdoor pool.

The traffic accident of a high school student under the influence of drugs leads the peppercorns to an allotment association.

Amy and her best friend Nika witness a theft. Why is Nika suddenly acting so distant afterwards?

Are the jackets that Leo is supposed to sell in the schoolyard fake? The peppercorns are in a real dilemma.

Djamila receives oil that she never ordered. The peppercorns quickly realize that something bigger is at stake here.

Hakim's classmate Tjelle is being blackmailed. Hakim's research leads to his mother, who is a pediatrician.

Amy finds a glitter pendant. At first nobody suspects that it could be valuable. Until someone vandalizes the headquarters.

Moritz and Hakim observe fifteen-year-old Azra selling suspicious bags at school. Homemade organic gummy bears, she explains, but Moritz doesn't believe a word of it. Azra threatens to hurt his little sister if he doesn't leave her alone. What's really in these gummy bears? When Moritz sneaks down to the attic at night to check the lab results, his mother secretly follows him. This leads to a shutdown of headquarters. The Peppercorns are devastated, but then the case takes an unexpected turn...

Jasina finds herself in the middle of a dramatic chase, during which she is secretly given a mini USB stick. The data stored on it leads the Peppercorns to the trail of an illegal wildlife trafficking ring. A bald eagle promptly disappears from the zoo—but unfortunately, so does Jasina, who was on the trail of the perpetrators... And all of this happens on the very day the Peppercorns have to say goodbye. Amy keeps her cool amidst all the excitement and passes the baton to two potential successors.

From the HQ window, Taara observes something in the building across the street that she considers suspicious. Jules is skeptical—the items the man over there has stashed away in the dead of night look like ordinary children's toys to him. Jules's opinion changes when Taara discovers that the rubber bouncy toy for toddlers is a recently stolen piece of modern art. What now? Still inexperienced in dealing with crime, the two set out to track down their first perpetrator—and find a new friend and cool co-detective in Malin.

There's a lot going on in Kofi's group home: Roommate Freddy is preparing to move out, a new roommate, Piet, is moving in, and then someone vandalizes the office, causing valuable items to disappear. Is troubleshooter Nico behind it? Or could supervisor Arne be right and Piet was just looking for attention? Taara, Jules, and Malin offer Kofi their help – and as the investigation progresses, Piet reveals himself not only to be innocent, but also to be a valuable detective and an excellent snoop.

In HafenCity, a homeless man is hit at night – with Alva's car. And the victim, whom Malin knows and likes as E.T., provides a description of the perpetrator that fits Alva perfectly. Since Malin's grandmother has a watertight alibi and the Pfefferkörners quickly realize that there's something fishy about E.T.'s statement as well, they begin to investigate. They discover that cars with a radio link are incredibly easy to steal. And that the homeless man who was hit had a good reason to lie. If they want to exonerate Alva, they have only one chance: They have to set a trap for the car thieves...

During a firefighting operation, Pascal suffers from dangerous smoke poisoning. Jules, who is already constantly worried about his father, wants to get to the bottom of the cause. Did someone neglect the maintenance of the breathing apparatus? Or is this possibly sabotage and a targeted attack on the fire department? Taara is skeptical and thinks Jules is just in panic mode again. Only Malin understands his fears and actively supports the investigation. A spontaneous declaration of love ensues – or is Jules on the wrong track here, too?

Kofi films his friend Till doing parkour, who immediately posts the video online and immediately garners likes and hearts from his fangirl Lea, who has been following him for a while. And not only that: Lea's father is a photographer and already has him in mind for an advertising campaign – test shots are scheduled for tomorrow! Kofi is happy for his friend, but shortly afterwards, Till's phone disappears. When it reappears, all the data has been deleted, including the address for the photo shoot. With Jules' help, the data is restored, and Till can leave for his appointment.

Kofi and Piet's group home has a new roommate, Milo Kaya. The sixteen-year-old is trying to escape from his criminal family clan with Arne's help. But he is suddenly suspected of stealing valuable professional tools: the stolen goods, including his fingerprints, are found in his trunk. Milo is so disappointed in him that he leaves the group home in a hurry. The Pfefferkörners, on the other hand, firmly believe in Arne's innocence and investigate on their own, visiting old friends and eventually visiting a children's play paradise.

Noah and Pfefferkorn Taara are the English losers in their class. Both suffer from the pressure to perform at school. When their teacher, Amsel, refuses to grant Noah time off for basketball training camp, he flies into a rage. Shortly thereafter, the teacher discovers that their car tires have been slashed. During interrogation, Noah confesses to the crime, but Taara doubts his guilt. His classmates Ella and Li Ming become the Pfefferkorns' targets. How far would the committed girls go for their environmental campaign "To School Without a Car"?

The radical animal rights organization TBF uncovers a doping scandal and suspects veterinarian Nina Berger of being partly responsible. The veterinarian is the mother of Piet's classmate Hanna and runs a practice where their dog Bagel is also vaccinated. When a stone flies through the practice window during treatment and a threatening letter from TBF appears, Piet begins to investigate. He discovers that Nina's daughter, Jule, is a staunch animal rights activist and that the two are at odds. But is she responsible for the attacks? Together, Piet and Hanna find new leads.

Early one morning while jogging, Pfefferkorn Malin hears a scream and spots an injured man who appears to have fallen off a building facade. But before she can make out his face, the figure flees, leaving Malin alone to face the police. It turns out that someone has been trying to steal copper pipes. Naturally, the Pfefferkorns want to solve the case, especially since Malin fears the perpetrator might be from her climbing club. However, when she is caught breaking into a locker, she is suspended from training – and feels misunderstood by everyone.

During a choir rehearsal at school, a fight breaks out between student Ana and her former best friend Janine – and Ana leaves the room crying. While trying to comfort her, Malin notices signs of abuse on Ana's arm. The Pfefferkörners try to mediate between the girls and learn a shocking revelation: Ana's father allegedly beat both Ana and Janine. But then it turns out that Janine lied to get revenge for filing a report with the youth welfare office. Before she can be confronted, Ana suddenly disappears without a trace.

On Girls&Boys Day at a bank, Malin, Kofi, Taara, and Jules become embroiled in a robbery and extortion case: Amelie, the bank director's daughter, is kidnapped and her mother is being blackmailed for four million euros in ransom. Thanks to Kofi's observations, the Peppercorns quickly learn who the criminals are, but all attempts to stop them in the bank fail. Kofi himself is in great danger. They must act quickly. At the same time, more than just friendship is developing between Kofi and Taara. The uncertain feelings and the danger demand all their courage.