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 struggles to understand Grace's actions, while the local Gardaí look closer at the Ahern family as the investigation ceases treating Denis death as an accident.

Val looks to Mairead for support when Carl comes under fire as events from his past life in Denmark come to light, while Calum has a run-in with a group of local lads.