When New York City police officer O'Malley learns of a young man who is about to embark on a life of crime by taking part in a robbery, he takes the boy aside and tells him the story of Boomerang Bill, another wanna-be gangster who wanted to be a big shot in the New York crime scene. It seems that Bill fell for a pretty young dance-hall girl, and went up against local gang boss Tony the Wop when he insulted her. Tony, who never forgot a slight, found a way to make things very, very tough for Boomerang Bill, in a way that he never saw coming.

Foreign powers keep getting their hands on U.S. military secrets, so the head of the American diplomatic corps calls in his nephew Dick Stansbury to help. Stansbury knows that Doctor Montell is at the bottom of this, so he poses as an inventor of an innovative aerial gun. This sparks the doctor's interest, and when they both attend a weekend party at the Ryerson estate, Montell tries to get Stansbury to sell the gun to his country.

Henri Labordie (Tavernier) is the father of twins. Jeanne (Taliaferro) is sweet and winsome while her brother Jaques (Taliaferro), pampered by her father, is ill-tempered. When Jaques dies through his own caddishness, Jeanne, to spare her father from the shock, clips off her hair and dons boys clothing so that her father will think that it was her and not Jaques who drowned in a stream. When Labordie dies, Jeanne's deception ends when she goes to Montreal to fulfill an ancient pact, and there she finds happiness

The daughter of a Chinese mandarin is sentenced to death for her secret marriage to an American. Their child, raised in the mandarin's palace, grows up and escapes to seek her father, now a high-ranking official in the Philippines.

Three men in London compete for the love of a dance-hall girl.

Coming to the U.S. from his native land to study Western civilization and continue work for his government young Chinaman Tsing Yu-Ch'ing attends an American university, then launches a Chinese newspaper in New York City. He also falls in love with the lovely Kathleen Levinsky who is blind. The daughter of a Jewish father and an Irish mother. Kathleen's life is barren of love, and she gladly accepts his attentions. When Dr. Hardwick, a classmate from college, calls on Tsing and meets Kathleen, he offers to cure her blindness through surgery. The operation is a success, but the newly sighted Kathleen is visibly upset by Tsing's appearance. After saving Kathleen from a killer known as the Hatchetman, Tsing returns to China and commits suicide, believing he will find eternal love with her in the afterlife.

Howard Spurlock, wrongfully accused of theft, believes police are seeking his arrest. On "the ragged edge," he takes refuge in China, where he meets and is nursed back to health by Ruth Endicott, daughter of a missionary. They marry and go to an island in the South Seas where, later, his innocence is proved.

A prostitute living in Panama shoots her pimp and is charged with murder. The lawyer who gets her off fronts her money to start a new life in NY where she becomes a successful business woman and meets wealthy businessman, Harry Davenport. He knows nothing of her past. Then someone from the past shows up. Will she be exposed? Will she follow through on her plan to marry?

Jacqueline Roland, the daughter of a backwoodsman, meets Henri Dubois during a visit to the city, but is unresponsive to his attentions. Henri later takes charge of the lumber camp where Jacqueline lives, and is closely followed by Li Chang, who is blackmailing him to keep secret a murder he committed years earlier. The new boss is determined to win Jacqueline for himself and convinces her lover, Raoul Radon, that she no longer cares for him. When Li Chang kidnaps Jacqueline, Henri comes to claim her and an oil lamp is upset during the ensuing struggle. As the fire spreads into the forest, Jacqueline escapes with Li Ching in pursuit. She and Raoul are reunited, while Henri perishes in the blaze.

Anson Campbell returns from the seminary to a small village on the New England coast. When the puritanical villagers persecute Bess Morgan, a "fallen" woman, he sticks up for her, telling them that their form of "Christianity" isn't Christian at all. This has no effect on the bigoted villagers and they turn their anger on him. Complications ensue.