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.

Notorious shootist and womanizer Quirt Evans’ horse collapses as he passes a Quaker family’s home. Quirt has been wounded, and the kindly family takes him in to nurse him back to health against the advice of others. The handsome Evans quickly attracts the affections of their beautiful daughter, Penelope. He develops an affection for the family, but his troubled past follows him.

Dunson is driving his cattle to Red River when his adopted son, Matthew, turns against him.

The crew of an Air Force bomber arrives in Pearl Harbor in the aftermath of the Japanese attack and is sent on to Manila to help with the defense of the Philippines.

Naive and idealistic Jefferson Smith, leader of the Boy Rangers, is appointed on a lark by the spineless governor of his state. He is reunited with the state’s senior senator–presidential hopeful and childhood hero, Senator Joseph Paine. In Washington, however, Smith discovers many of the shortcomings of the political process as his earnest goal of a national boys’ camp leads to a conflict with the state political boss, Jim Taylor. Taylor first tries to corrupt Smith and then later attempts to destroy Smith through a scandal.