Pip Carlton, devoted husband and respected pharmacist, is distraught when his wife dies in her sleep. With the police content to shrug off the mystery, he tries to restart his life, but Helen West, Crown prosecutor is suspicious and refuses to believe Mrs Carlton simply slipped away.

Pip Carlton, devoted husband and respected pharmacist, is distraught when his wife dies in her sleep. With the police content to shrug off the mystery, he tries to restart his life, but Helen West, Crown prosecutor is suspicious and refuses to believe Mrs Carlton simply slipped away.