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.
Passing through a small town, Joe is arrested for kidnapping. A lynch mob burns down the jail and Joe is believed killed. The incident has been captured on newsreel film and, for revenge, Joe urges his brothers to use the film to prove the mob guilty of his murder.