Oh, What a Night!

Ethel Vandiver and her friend, Marie Le Farve, arrive at the former's country home. Ethel's father objects to her seeing Douglas, whom he thinks is a sweetheart. But, unknown to her parent, Ethel has married Douglas a year before. The day on which she arrives she receives a letter from her husband stating that he would rather see her dead than be separated from her any longer. A few hours later Marie is found dead in Ethel's room.

District Attorney Holden and his special investigator Betty Higgins are trying to convict brothers Joe and Lou Manson, silk-racket hoods, after they are indicted for murder.

The quiet life style of Ruth Heck and her brother Lem, who belong to a religious sect called the Seekers, is disrupted when a judge imprisons Lem for a crime he did not commit.

John Reeves, steel magnate, wagers with his son Chester that he can earn twenty dollars a week and live on it. He procures work in the office of William Hart's steel plant. Against her brother's wish, Hart's sister Muriel adopts a little boy. Hart evens up by adopting John Reeves as his father. Reeves foils James Pettison's plot to ruin Hart. Chester also makes good as a workman and wins the affection of Hart's sister. The father reveals his identity and takes Hart as a partner.

U.S. Secret Service agent Truxton Darnley attires himself as a sailor and boards a schooner owned by arms smuggler Gus Olsen, who is in the employ of German spy Von Linterman to smuggle arms to German raiders in the South Seas. Truxton learns Gus’s plan to blow up the National Munitions Plant in San Francisco, just before his identity is discovery and he is thrown overboard. Washed ashore on the island of Moana, Truxton meets native girl Lurline. Promising to return to her, Truxton boards a steamer bound for San Francisco to foil the plot and soon afterwards Lurline’s father sells her into marriage with Gus. Escaping to Truxton's steamer, Lurline sails to San Francisco where Gus abducts her forcing her to dance in his Barbary Coast saloon. Truxton raids the bar, kills Gus is killed and the lovers are reunited.

When his aunt disapproves of his marriage to Mabel Deering and threatens to disinherit him, Percy elicits the aid of his buddy Billy Haskell, who is engaged to Eileen Stanley. It is arranged that Billy and Mabel be found together in compromising circumstances by Percy and his aunt, but matters are complicated by the arrival of Billy's uncle in the city, and Aunt Emma becomes very fond of him. All is subsequently explained and thoughts of "divorce" are smoothed away as Uncle Todd couples up with Aunt Emma, and Billy and Eileen, and Percy and Mabel, reinstitute their carefree engagements.

An American Indian child, maltreated by her mother and other tribespeople, accompanies her family to a nearby town to buy supplies. There, local white settlers — a couple and their young daughter — befriend the child and give her a doll, her first and only toy. Meanwhile, another tribesman is wantonly killed by a settler. Enraged, the Indians plan revenge and organize a war-party to attack the town. The Indians also take from the child the doll she was given and smash it. The child mourns her broken doll, and buries it with traditional tribal rites. Alarmed that her new friends will be harmed when the town is attacked, the child rushes ahead of the war-party to give warning of the imminent attack. In the raid the child is struck by a bullet, and makes her painful way to her doll’s burial site. Alone, she dies.

Robert Stevens robs the bank where he is employed, and through the efforts of Calvin Stedman, the prosecuting attorney, he is sentenced to six years' imprisonment. While in jail his wife dies and his little daughter, Agnes, is placed in a convent.

Jim Belmont, believing his wife Agnes loves Gordon Daniels, leaves for the Canadian wilderness with his daughter Cuddles and his dog Shep. He is killed by Mike Murdock at Daniels' instigation. Shep aids and protects Cuddles, who was abandoned to the mercy of the elements by her father's death. The dog fetches the trapper Poleon Dufresne, who sends for Agnes. She is followed by Daniels. Murdock confesses his crime to Dufresne. Shep saves Agnes from attack by Daniels and herds him to a cliff, where Daniels falls to his death. Agnes and Dufresne then wed.

Muriel Rossi (Mary Brian), the sister of a racketeer, Al Rossi (Harry Woods), falls in love with Bob Martel (Bruce Cabot), the son of a police detective, Joe Martel (Grant Mitchell). Their love affair causes bot families problems when Bob is framed, but saved as a result of his father's access to police department films.

A young man with little ambition is given an opportunity to set himself up in business by means of financial support from his father. But the young man becomes involved in a shady railroad deal which threatens to destroy his own father.

Mark Reid, a young prospector, discovers gold in the Sierra foothills. He meets an old man known as "The Good Samaritan," who counsels him and welcomes him into his home. While he is away registering his claim, another prospector, Mike O'Hara, comes along, and, seeing no one around, takes possession of the gold mine. When Reid returns, the two engage in a struggle. As Reid is about to be overcome, an Indian slips a dagger into his hand. Reid is about to stab O'Hara when The Good Samaritan appears and stops the fight. Reid and the O'Hara set aside their differences and decide to become partners.

The plot concerns a war hero who returns home determined to give up his old ways as a crook. Bud Doyle (Milton Sills) is still being hounded by the cops, and both his wife (Marcia Nanon) and a former associate, a dishonest politician, want to do him in.

Grace Ainsworth wants to return to her career as an opera singer, and her mother-in-law supports her. Grace's husband, Edwin, wants her to stay at home and to convince her, he relates the story of his latest play about a man who allows his wife to return to the stage. Edwin comes to believe that Grace is in love with Harold Chase, a manager, and the couple separates. Edwin has an affair with a dancer, Madeline, and he winds up in a fight with her dancing partner, Vincenti, which causes him to lose his memory.

Jack Pickford got his own production company when his sister Mary signed a huge contract with First National, and this was its first product. the story takes place in the Blue Ridge mountains, where the Appersons and the Yartons have an ongoing feud.