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.

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.

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.

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.

When Val Aherns' husband Denis is found dead at a foot of a cliff close to their home the morning after a family party, she begins to interrogate his relationships with his family.

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