Helen has happily remarried, her first husband being reported dead by the French police. Her daughter, Susan, distrusts her stepfather and thinks he only married Helen for her money. Michael, Susan's boyfriend, receives a blackmailing phone call which is followed up by two anonymous letters. After the mysterious Mr. Watson has received several visitors, it appears that certain people know more about the affair than they're prepared to talk about. Drugs and murder combine with blackmail to make this a suspense filled play.