A series of unexplained robberies are cracked when one of the victims reveals she was seduced by a handsome freelance car washer, who copied her keys and arranged to meet her later, but robbed her house while she was waiting for him. Despite Insp. Monroe's objections that she is too inexperienced, DC Skase arranges for probationary WPC Debbie Keane to go undercover as a lonely housewife to catch the thief at work. The plan goes well, but at the expense of Skase's car when he uses it to block the driveway to prevent the thief's getaway.