Engineer Jake Holman arrives aboard the gunboat USS San Pablo, assigned to patrol a tributary of the Yangtze in the middle of exploited and revolution-torn 1926 China. His iconoclasm and cynical nature soon clash with the 'rice-bowl' system which runs the ship and the uneasy symbiosis between Chinese and foreigner on the river. Hostility towards the gunboat's presence reaches a climax when the boat must crash through a river-boom and rescue missionaries upriver at China Light Mission.

Chicago February 14th 1929. Al Capone finally establishes himself as the city's boss of organised crime. In a north-side garage his hoods, dressed as policemen, surprise and mow down with machine-guns the key members of Bugs Moran's rival gang. The film traces the history of the incident, and the lives affected and in some cases ended by it.

The buoyant Molly Brown has survived the first crisis of her life—a flood. Sixteen years later she sets out to make her way in the world. She assures the Leadville saloon keeper that she can sing and play the piano, and learns quickly. Soon she marries Johnny Brown, who in a few years will be able to replace the original cigar wrapper wedding ring with a replica in gold and gemstones. The Browns head for Europe and bring a few crowned heads back to Denver for a party that turns into a ballroom brawl. Molly goes to Europe alone, returning on the Titanic. She didn't survive a flood as a baby for the story to end here.

The brother and fiancee of a dead policeman infiltrate a female-led biker gang to uncover his murderer.

A Martian teenager sent to prepare for an invasion falls in love with an Earth girl.

In the slums of the upper West Side of Manhattan, tensions are high as a gang of Polish-Americans compete against a gang of recently immigrated Puerto Ricans, but this doesn't stop two romantics from each gang falling in love.