When a decomposing body is fished out of the Thames, the police think that at least identifying the victim will be straightforward. Around his wrist is a hospital band. On it is written the name of Dr F. Klein. But psychotherapist Frieda Klein is very much alive. After evidence linking her to the death is discovered Frieda suddenly becomes the prime suspect. Unable to convince the police of her innocence she is forced to disappear. On the run and uncertain who to trust, Frieda must uncover the truth and expose the real killer while the net closes in around her.