Thirteen years after a dinner party where the wealthy host dropped, the thirteen guests are invited to reassemble at the dinner table. First to arrive is Ginger Rogers--who is promptly killed. It turns out that the dead woman was an impostor, hired to impersonate a real guest (Ginger Rogers again). Playboy detective Lyle Talbot is called in to investigate. It seems that the man who died 13 years ago was just about to announce the heir to his fortune, thus all the guests fall under suspicion. The culprit's true identity is hidden by a hood; the culprit's method of murder is a complex electrocution device. In an excitingly staged finale, Ginger is kidnapped by the hooded killer, but is rescued by Lyle Talbot. Made on a shoestring by Monogram Pictures, Thirteenth Guest is a marvelous "old house" mystery, with Ginger Rogers giving her all as the damsel in distress.