Val Ahern's world is rocked once again when a stranger turns up on her doorstep an introduces himself as Denis's son.

Val and her three daughters are stunned to see `Liar" scrawled in lipstick across the mirror. meaning someone is clearly out to get her.

As the Aherns prepare for Calum's birthday celebrations, they struggle to maintain a semblance of normality as the campaign of terror against the family escalates.

In the aftermath of the birthday party, the family is in disarray. Elaine insists she has been set up but fingers are being pointed in every direction.

Val tries to figure out who she can trust and how she can protect her family from danger, while Finn agrees to help Elaine convince Calum her drink was spiked the day of the crash.

Val is determined to confront Alanna once and for all, but she realises a more dangerous threat is brewing much closer to home.

Attempting to put her life back together after the tragic events of the last few years, Val has found love in the arms of a new man – Paul Madigan. But on their wedding day, old ghosts come back to haunt Val and her family.

As Jenny looks for evidence to incriminate Elaine, Val's world is rocked when Paul reveals a bombshell of his own.

Jenny and Anna confront Elaine over their sister's death, while an increasingly isolated Val must face up to her own worst fears about Grace when she undergoes therapy.

Paul convinces Val that she has to cut herself off from her family due to their toxic influence, but she struggles to stick to his advice. Jenny and Anna travel to Donegal to investigate Grace's death themselves and they make a shocking discovery while there.

Val refuses to listen to Jenny and Anna's fears that her life is in danger, but when she finally realises what Paul has been hiding, events spiral towards a shocking conclusion.

On trial for murder, Val's fate appears to be sealed as the events surrounding the death are presented to the court and the Ahern family are thrust back into the spotlight. But there may yet be one final twist in this tale.