A final conversation between a recently separated couple on their last night together before parting ways.
Danny was a baby when his mother was killed in a car crash. Overcome with grief, his father locked him away in a house, telling him the outside world is full of monsters that will spirit him away like his mother.
Retired archaeologist and crossword setter Judith Potts believes that a brutal murder has taken place in the sleepy town of Marlow; when the police refuse to believe her story, she kicks off a private investigation with two unlikely friends.