France, 1915. Young and radiantly beautiful Centaine de Thiry is the happiest woman in the world: in a few more hours she will be married to pilot Michael Courteney, the love of her life. But fate has it otherwise: Michael is shot down in a reconnaissance plane shortly before his wedding. Life has lost its meaning for Centaine. When the young woman realizes soon afterwards that she is expecting a baby, her zest for live is revived. She decides to give birth to the child in South Africa, the home country of her deceased fiancé.

After Bugs' giant gold nugget is stolen by Nasty Canasta, he tries to win it back at Canasta's San Francisco gambling hall.

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