 Warren Childs has two female accomplices (Charlene and "The Blonde") who pose as hitchhikers in order to rob male motorists that are carrying large sums of cash. The Blonde steals $2,500 from businessman Doyle Houston, but is forced to shoot and kill him when he tries to fight back. Dan Mathews investigates the murder and traces Childs, Houston, and the two women back to the Highway Motel. When they learn that Houston had left a nearby restaurant with The Blonde, they realize that Childs and both women have been involved in the crimes. Dan trails the three to a remote cabin and captures Childs and Charlene. The Blonde initially eludes Dan, but her distinctive "Midnight Lure" perfume ultimately proves her undoing.