Nathan (Russell Tovey, Looking) has it all: a loving wife, beautiful home, and a great job. But he's never been able to forget the worst night of his life-a party that led to the death of a young woman. When an old friend (Bertie Carvel, Dalgliesh), the only other person who knows the truth of what happened, shows up in a deranged state, Nathan must decide how far to go to keep his secret safe.