Shortly after the engagement of John Brown and Hope Avery is announced, he receives an offer of a fine position in South America. She demurs at his going, but he overcomes her objections and after a tender farewell, leaves her with the promise to return within a year and make her his wife. Philip Lane is injured in an auto accident near the Avery home, and Hope discovers him. She has him taken to her home and during his convalescence, he falls deeply in love with her.

During World War I, a professional thief known as The Lone Wolf is assigned to steal a cylinder with important information from behind the German lines and bring it to Allied intelligence headquarters. However, German agents set out to stop him, headed by the man who was responsible for the death of the thief's sister.

A beautiful young girl, Lola, is a dancer at a private club for wealthy men in New York City. Some of the club members make a bet that Lola can't seduce a young doctor, Jennings. Her attempt fails, and in order to find out why she follows him around and discovers that he runs a clinic on the city's poor Lower East Side. She begins to see the young doctor in a new light, and sets out to help him build the emergency hospital he's always wanted.

Retired heavyweight champion Jake Punchim is a fitness nut, keeping himself, his wife, and their twin daughters Helen and Dot in constant training much to Dot’s chagrin. While out walking separately one day both girls meet young men who are perfect for them but completely wrong for the other sister and make a date to meet them in the park at 2:00. When they arrive and the men mistake each sister for the other. Complications follow particularly when Daddy Jake becomes involved, but it all ends happily.

Malvini, retires to a monastery after his wife elopes with another man. After 20 years, Malvini returns to find his daughter, Valeria, accused of murder. Her lover, Mario, had actually shot the man in self-defense, but the dying victim blamed Valeria. Mario, initially driven insane by the event, recovers and explains what happened. The priest intervenes with the King, Valeria is freed, and Mario is pardoned. The film ends with the priest marrying Valeria and Mario.

Female gang leader, "The Tigress," is married to a master criminal. She steals a child from a wealthy family and raises him as her own, giving him all her love while keeping him unaware of her criminal activities. She becomes the de facto leader of the gang and rules them with an iron will.

Dalton, a promising young doctor, becomes infatuated with a dancer named La Stella who introduces him to drugs, and he becomes a morphine addict. His addiction leads to the death of a child due to a fatal medical error while he is under the influence, ultimately ruining his career.

Paul Sturgess is engaged to Grace Van Austin. At a party at their Newport home, Grace flirts with Howard Esterbrook leading to a fight between the two men. Later that night, a servant witnesses Paul, with a revolver entering Esterbrook's room. The servant follows, sees a hand emerging from a window curtain, stab Esterbrook then vanish mysteriously. Paul is arrested based on circumstantial evidence. Six months later, a woman known as "The Woman of Mystery" is shot during a raid while trying to assist the police. Moved by hearing about Paul's denied pardon and impending execution, the "Woman of Mystery" reveals information to the detective leading the raid. This revelation leads to a call to the Sing Sing Warden just in time to halt Paul's electrocution.