A scientist discovers a death ray and locks it in a box, giving the key to his daughter, who soon finds herself hunted by criminals looking to steal the deadly mineral.

Refusing to marry her stepmother's choice, Gail Prim leaves her life of luxury, after cutting her hair, dressing in her butler's clothes and stealing money and jewels from her father's safe. Spending the night in a barn, she introduces herself to the thieves already there as the Oskaloosa Kid, a wanted criminal, and barely escapes their struggle to get her loot. Meanwhile, the real Oskaloosa Kid kills Reginald Paynter and throws Nettie Penning, whom Reginald was trying to seduce, onto the highway.

Professional thief Joe Grim is killing time in New York City's Central Park before he robs the Wall Street subtreasury. He spots pretty young Laura White on a runaway horse. He manages to rescue her. Falling for her, he tries to steal a photo of her but is discovered and held at gunpoint by Laura's friend Countess Briand--who, unbeknownst to Laura, is actually the head of a German spy ring, among whose members if Laura's fiance Karl Richter. The countess convinces Joe to steal plane for a new airplane by telling Joe that they're papers that are being used to blackmail Laura. But things don't go exactly as planned.

When Roberta Carruthers' father, Capt. Carruthers, is killed in France during the war, she comes to live in the US with her uncle. When she finds out that her uncle is under the impression that his brother had a son and not a daughter, she decides to disguise herself as a male, and calls herself Bob.

Nora, a girl of the lower East Side of New York City, marries a rising ward politician. A child is born. They are happy, but the young politician is running for office against the old ward boss and has to be out every night. The wife becomes jealous of a certain woman. Nora's child dies. Things get worse for her as jealousy and the seeming neglect of her husband increase. She finally leaves him and becomes a model for a noted painter. The husband finds where she is, but makes no attempt to force her to return to him, though he still loves her. One of the artist's friends, a magnate in the motion picture business, promises her a chance. Her rise to stardom is quick. The climax of the story is a struggle between the old love and the new fame. She does not know that the politician has become a first-class lawyer. Finding that the old love and the new fame are not incompatible, she is reunited with her husband.

When composer Anselm Kardos leaves his alcoholic wife, he gives his daughter Lily an unfinished love ode entitled "The Song of Songs" and warns her to keep her artistic temperament in check.

A writer bets a publisher friend that he can write a 10,000-word novel in 24 hours. The publisher takes the bet, and gives him the "only key" to his Baldpate Inn, which has been closed for the winter, so he can write in complete seclusion. Things start heating up, though, when a succession of people who also have keys to the inn begin showing up.

Robert Strickland, the self-confessed murderer of Gerald Trask, refuses to defend himself on the witness stand. His attorney, however, cross-examines Strickland's wife.