In an English mining town during the 1870's, Joan Lowrie falls in love with Fergus Derrick, the new chief engineer who vows to improve working conditions. Joan's father Don, however, runs the mine and likes conditions just as they are. As a result, he quickly learns to detest the crusading Fergus, even to the point of trying to murder him.

Letters from the late mother of orphaned sisters Jane and Katherine seem to indicate that their father is Capt. Bob Dutton. Under orders from his superior, Colonel Harding, to acknowledge the children or quit the service, Dutton accepts responsibility for them. Shocked by his presumably checkered past, Cecile Harding, Dutton's fiancée and the colonel's daughter, breaks their engagement. One evening Jane surprises Capt. Robert Duncan, Dutton's rival for Cecile, stealing Bob's papers.

A young American man arrives in London to claim an estate he has inherited. One of the conditions is that he signs a paper stating he will never sell the estate. When he arrives at the estate he now owns, he runs into a ring of American gangsters there and discovers that the estate is the site of some buried pirate treasure.

A cabaret hostess falls for a young aristocrat, ignoring her friend's warning that the affair will end in heartache.

Andrew Kane, the spoiled and wayward son of once wealthy parents, vies with stockbroker James Surbrun for the hand of Jule Grayton, the wild and willful daughter of a philanthropist. Accused of murdering his rival, Kane is convicted but later cleared of the charge. The "wild" couple settle down and find happiness in reconciliation.

Don Caesar de Bazan, a reckless nobleman, falls for Maritana, a gypsy dancing girl. When Maritana is insulted by a drunk, Don Caesar wins her love by coming to her rescue. The two go to Madrid, where the girl is summoned to dance before the Queen. Maritana also attracts the attention of King Charles. Don Jose, the prime minister, who secretly loves the Queen, plots to get Maritana for the King. To do this, he schemes to have Maritana marry a nobleman so she can enter the King's court.