Elena and The Pack are on the hunt for Malcolm. Meanwhile, back at Stonehaven, Jeremy receives an ultimatum from the Council of International Alphas that challenges his leadership over North America.

Clay investigates a mysterious symbol that may be related to witchcraft while the rest of The Pack interrogates a captive Malcolm. However, when both inquiries lead to the same destination, The Pack is faced with a disturbing truth – witches live among us.

When a new threat proves to be more powerful than anticipated, both The Pack and Coven suffer heavy losses in the confrontation.

Elena awakens to find herself the subject of painful tests in a hidden compound run by a maniacal and powerful cult leader. Meanwhile, The Pack and witches must resort to dark magic in an effort to track down their missing members.

In order to stay alive, Elena must guide Dr. Bauer through her first Change as The Pack and Coven try to figure out who Aleister is, and where his compound is located.

Aleister casts a mind-bending spell on Elena, forcing her into a battle against her own dark fears and demons. Meanwhile, Rachael is locked in a cage with Logan, struggling to come to terms with what he is. In a nearby forest, Clay and Paige must overcome their personal differences in order to find Aleister’s compound.

When the new Spanish Alpha tries to blackmail Jeremy into murdering the Russian Alpha, the Pack has things under control until a surprise visit from Savannah upends their plans. Nick and Paige try to secretly meet Nick's mother.

Having possessed Clay’s body, Aleister returns to Stonehaven where he creates ideal conditions to abduct Savannah. Meanwhile, Clay finds himself trapped in his unconscious, wrestling with both the occupying Aleister and his own mind in a way that could destroy him.

Rachel and Logan battle their own demons as Aleister’s Undoing takes hold of the witches and has unexpected consequences for the wolves. The Pack and the Coven do their best to defeat him before sunrise—when life as they know it will change forever if Aleister and Clara get their way. A reluctant Ruth resorts to Left Hand magic to fight her son while a surprise ally appears to offer help to Jeremy and his Pack.

Elena and The Pack storm the Delphi building to save Savannah, the witches, and the werewolves in a final showdown against Aleister and Clara.

In order to solidify his power, a war hardened Jeremy has tasked Elena, Clay and Nick with recruiting all North American Mutts into the Pack. Meanwhile, Elena is accosted by mysterious new characters who challenge her with a surprising claim.

Elena struggles to deal with a new discovery about her past. Clay readies Stonehaven for a possible attack from the Spanish by calling in new Pack members. Meanwhile, Jeremy and Nick find a clue at the Spanish hideout that ultimately leads to them rushing back to Stonehaven.

Elena struggles to convince Jeremy to protect her blood family against the Russia Alpha; Nick uncovers Roman's plans.

Jeremy attempts to broker a negotiation to end the thirty-year blood feud between Sasha and Roman. Meanwhile, Elena watches over Pack prisoner, Konstantin, who tries to deduce why she is protecting Sasha.

Jeremy deals with fallout from the failed negotiations between Sasha and Roman; Elena attends to an injured Sasha; Clay and Alexei track down the victim of a young wolf's attack.

Elena and Clay take on a deadly new foe to save Marsten; Paige and Nick try to find the cause of Rocco's magical outbreaks; Katia tries to save her family.

Nick, Paige and Rachel track Katia with magic; Elena invites Konstantin to Stonehaven and asks for his help; Clay and Jorge keep an eye on the Albino.

As the Alpha, Elena sets out with Clay to take down the Albino; Nick and Katia are captured by Roman's henchmen; Jeremy gets help from a surprising ally in his quest to kill Roman.

When Elena tries to comfort a grieving Sasha, they get lured into the woods and are taken prisoner by the Albino; Jeremy wages psychological warfare against his captor; Clay, Nick and Alexei race to save a new Alpha.

Elena comes up with a dangerous plan to take back Stonehaven, save the Pack, and change everything forever.