Still picking up the pieces after the death of her husband Denis and the cover-up that followed, Val Ahern's world is rocked once again when a stranger turns up on her doorstep.
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, with Elaine insisting she has been set up, but fingers are being pointed in every direction.