Nicola and Richard Gresham, are the parents of a young woman who's been murdered. With the help of their daughter's boyfriend, Adam, they help police to stage a reconstruction of her last movements. But, as often happens, the murderer is close by, and it's not long before trusty pathologist Paul figures out whodunit. After killing his girlfriend Hannah, Adam lies to the police saying a previous boyfriend has been following her and blames him for her disappearance. A press conference is called asking for help in finding Hannah, but Dangerfield is not sure that Adam is telling the truth.