Someone in a skull mask is killing British businessmen, and Scotland Yard's Chief Inspector Hugh Patton (Dieter Borsche) is stumped. Enter mystery author Clarinda Smith (Barbara Rütting), whose interest in the case leads her to the culprit while Patton is still clueless. She'll tell him all she knows, of course, but he'll have to buy her next book to find out how it ends. Hans Söhnker co-stars in this mystery based on Bryan Edgar Wallace's novel.