When several women are found mutilated and murdered, the Paris police are baffled as to who the killer may be. All evidence points to Dupin, but soon it becomes apparent that it is someone (or something) stronger and deadlier than a human.
A wheelchair-bound photographer spies on his neighbors from his Greenwich Village courtyard apartment window and, despite the skepticism of his fashion-model girlfriend, becomes convinced one of them has committed murder.
A successful song-and-dance team become romantically involved with a sister act and team up to save the failing Vermont inn of their former commanding general.