Mary Rutledge arrives from the east, finds her fiance dead, and goes to work at the roulette wheel of Louis Charnalis’ Bella Donna, a rowdy gambling house in San Francisco in the 1850s. She falls in love with miner Carmichael and takes his gold dust at the wheel. She goes after him, Louis goes after her with intent to harm Carmichael.

A schoolteacher and amateur sleuth suspects foul play when a fellow passenger on a sea-plane gets sick and dies. The third and last film with Edna May Oliver and James Gleason as the astute schoolteacher Hildegarde Withers and the New York Police Inspector Oscar Piper busy solving crimes. Based on a series of crime novels by Stuart Palmer.