Dangerfield is called in to re-examine Diana, the suspected rape victim, when she says she has been attacked again. His daughter Alison, meanwhile, discovers the fine line between amorous advances and date rape.

An aerial photographer spots a corpse in a field. When DI Ken Johnson investigates he calls in Dangerfield to supervise the forensic examination.

When the body of a naked woman is found by a canal, the police must discover who she is, when she died and how her body got there.