Fifteen years ago Uncle Paul was exposed as a murderer by his wife Mildred, and sent to prison. Now a seaside holiday for Mildred's half-sister Isabel and her family seems to be the venue for Uncle Paul's revenge. Mildred arrives at a lonely cottage near to Isabel's caravan site, and Isabel's urgent summons to her sister Meg brings the three women together to play out a drama of fear and suspicion, betrayal and revenge.