Cantinflas, a traveling photographer, is captured by some gangsters while trying to get some flowers for his girlfriend. The gangsters have confused him with the assistant of Dr. Penongo, a scientist who has discovered the formula of a new atomic bomb. Meanwhile, Penongo has suffered a car accident and has lost his memory ...
Une jeune infirmière est engagée dans un hôpital psychiatrique où des agressions nocturnes se succèdent. Le propriétaire de l'établissement essaie de dissimuler les cadavres ce qui lui vaut de subir le chantage d'un témoin. Et un personnage mystérieux se cache dans les combles.