Dick Seymour is fortunate in having a nice father and a nice girl as sweetheart. Money is coming to him. But, tempted by woman and wine on the great White Way of New York, he falls down badly. His money is in Paris. In that city he goes from bad to worse and is accused of murder. From jail and death there seems no escape. But his father and sweetheart have been loyal to him and he is proved innocent of the crime and saved. He finds happiness by shunning bad company and bad habits.

After squandering his entire estate, Roy Schuyler is forced by his creditors to marry wealthy Laura Reid. Her half-sister Ann tries to warn her of Roy's motives, but is kidnapped by Roy and incarcerated in an asylum before she can. Roy then tries to force Laura to sign a document which would accord him control of her estate.

Sincere but struggling sculptor Tommasso (Caruso--bushy moustache, gawky) works in an ornamental plaster shop, but his masterpiece on the side is a bust of his cousin Caroli (Caruso--no moustache, polished), who is the Metropolitan Opera's leading tenor. Tommasso hopes to marry his model Rosa, but her father, restaurant owner Pietro, wants her to find someone more settled and money-conscious, such as the greengrocer Lombardi down the street. Tommasso, he says, throws away his money, such as for a pair of tickets to take Rosa to the opera to see his famed cousin. After the opera, the cousins cross paths in the swanky Galeotto's restaurant, but when neither recognizes the other, Tommasso is generally mocked and Rosa believes him a liar and unworthy. Tommasso must recover his reputation and make a sale, preferably the Caroli bust to his cousin, in order to win Rosa back.

Story of the gentleman thief.

Countess Margherita is a Sicilian girl who is about to be married, but Caesar Maruffi, the head of a criminal syndicate, wants her for himself. He arranges to have the bridegroom assassinated, and Norvin Blake, a young American (Robert Elliott), almost loses his life in his attempt to save him.

George Anderson, a struggling author, works in the daytime as a clerk in the office of Emmet Standish, the publisher, and at night writes on his novel, "The Mortal Sin."

Italian peasant girl deserts her fiancé for wealthy gangster and departs for America.

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.

Twin sisters Rosetta and Lola Gelardi live happily with their aging father, Professor Gelardi, until their Sicilian village is destroyed by an earthquake. Unable to find Lola, the professor and Rosetta move to New York, where she obtains employment as a stenographer to author Aubrey Hapgood. Rosetta captivates Aubrey and his friends, but Mildred Sanders, who had hoped to win Aubrey for herself, tries to ruin Rosetta's reputation. On a drive with Aubrey, Rosetta relates her life story, whereupon Aubrey, claiming he loves her, takes her to an inn. Although he promises to marry her, she later reads of his engagement to Mildred. Rosetta shoots herself, after which Lola appears to avenge her death by causing the ruin of Aubrey's sister. Aubrey fires on Lola, but Rosetta awakens in his car and realizes that it was all a dream. While the chauffeur repairs the car, she and Aubrey walk into town to find a preacher.

Bianca, a Corsican, supports her frivolous sister, Rosa, by making laces. The sculptor, Manatelli, visits her cottage to buy laces, and sees her modeling in clay. Impressed by her talent, he offers her free instruction if she wishes to come to Paris. Bianca accepts and promises to send for Rose as soon as possible. In Paris she meets Etienne Du Inette, head of the Internationale, a powerful secret service organization. He and Bianca are instantly attracted to each other.

Faced with the tragic responsibility of choosing between the happiness of her 16-year-old daughter Pamela or saving the life of an innocent man, Marie Baudin's first impulse is to sacrifice all for her own. But she has second thoughts that bring complications to all.

Richard Hall is a successful writer, while his wife, Alice, is interested in pursuing a career as a singer. She meets James Hamilton, a musical agent, who arranges an opera engagement with Rimini, an impresario. Hall quarrels with his wife over this, and they separate, with Hall taking their daughter Grace.

Queen Anne of Gzbfernigambia, who is betrothed to King Stephen of Hetland, flees to the United States with Baron Cosaco when a revolution breaks out in her country.

Pierre Felix, a couturier, makes a $25,000 bet with Ralph Courtland that he can take a girl from the streets, dress her appropriately, and within three months have her accepted into society.

The wide-ranging storyline of The Melting Pot takes its characters from the Jewish ghettoes of Russia to the Lower East Side of New York.

Francesca Brabaut, who married an artist against her father's advice, regrets her decision when her husband Antoine, in debt, sends her to his misanthropic uncle to plead for money.

Blind Eleanor is cared for by her father's friend and eventual lover, Burton Lester, who arranges a sight-restoring operation. Upon recovering her sight, Eleanor discovers Burton is married, leading her to seek independence by completing her father's art and becoming a renowned artist in New York. After a misunderstanding involving a lost necklace and Burton's kindness to a friend, Eleanor reconciles with Burton and they become engaged.

Krishna Dhwaj, the son of the Maharajah of Rhamput, is in love with Lakshima, the daughter of the Maharajah of Bhartari, but their fathers will not allow them to marry. Krishna is then sent to Harvard to get an American education. Lakshima, determined to kill herself when her father orders her to marry an old man, jumps into the ocean. She does not drown, however, but is rescued by George Morling, a Bostonian, who smuggles her on board his ship dressed in boy's clothing. George, the son of a minister, is engaged to a proper Bostonian woman. Although he has not behaved improperly, George fears that his fiancé and her father will not understand the situation, and so he hides Lakshima in a trunk. Once back in Boston, George's fiancé discovers Lakshima and is horrified, but after several misunderstandings, George and his fiancé are reconciled, and Lakshima is able to find and marry her Indian sweetheart Krishna.

Marcia Calhoun, a talented but penniless singer, leaves her Southern home hoping to study opera in New York. Her instructor, Professor Didot, promises her a contract on the condition that she receive formal training in Italy for one year. Didot introduces Marcia to millionaire Philip Bradley, who offers to pay for her studies if she will accompany him to Italy as his mistress. Desperate for money, she agrees, but several months later, Philip abandons her.

Although Raimond deMornay is in love with his cousin, Claire, his younger brother Louis wins her. Because of the intense jealousy he harbors towards Louis, Raimond goes to Vienna, and then to India. He returns home at the request of his nephew Paul -- Louis and Claire's son. But Raimond's jealousy is still overpowering, and with the aid of a box containing cobra poison, he murders his brother and hides his body in a casket.