Hans B. Wagenseil

A man who owns a diamond importing business goes out for a night on the town with his girlfriend, her brother and her brother’s fiancé. The group stops by a circus to see the act of a trapeze artist who’s a friend of the man’s girlfriend. The performer suggests that all the men go out for a few drinks, and the next thing the businessman knows, he’s waking up in his apartment with a terrible hangover and a dead body in his room.