To solve the murder of a man shot in a locked room, Chan must wade through a Fun House, the writings of an unscrupulous author, and chess pieces.

Gerry and Tom Jeffers are finding married life hard. Tom is an inventor/ architect and there is little money for them to live on. They are about to be thrown out of their apartment when Gerry meets rich businessman being shown around as a prospective tenant. He gives Gerry $700 to start life afresh but Tom refuses to believe her story and they quarrel. Gerry decides the marriage is over and heads to Palm Beach for a quick divorce but Tom has plans to stop her.