Duke Fergus falls for Ann ‘Flaxen’ Tarry in the Barbary Coast in turn-of-the-century San Francisco. He loses money to crooked gambler Boss Tito Morell, goes home, learns to gamble, and returns. After he makes a fortune, he opens his own place with Flaxen as the entertainer; but the 1906 quake destroys his place.

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.