Bessie Allen, a girl of the slums, dances in the streets of the Lower East Side of New York to the delight of the crowds. She becomes an orphan when her father, in a drunken stupor, kills her mother, and then himself. Bessie is knocked down by the car of Mrs. Latham, a society matron, who takes an interest in the girl and procures her a job as a dress model.
Sick of life in the city after his fiancée deserts him, Merrill Day goes to the country for a rest with his sister and niece. There he meets Joan, who has lived in the hills for her whole life, and they quickly begin a romance. Grekko, however, a hunchback who has loved Joan for years, convinces her that Merrill's sister is really Merrill's wife.
Papa is proud of his new birthday present, a shotgun. Mary's boyfriend arrives for a visit and she is anxious to introduce him to Papa. When Harry sees Papa walk in with a shotgun he misunderstands and departs in terror. Harry continues to encounter Papa everywhere and runs away, baffling the old man. At last Papa hauls Harry back home for an explanation and a reunion with Mary.
Mrs. Jones leaves her baby with the maid and goes shopping for a new hat. Meanwhile, the maid invites a band of gypsies into the house for a palm reading. After the gypsies leave, no one can find the baby, and everyone assumes it's been kidnapped-- until the baby is found under a hatbox.
A new bride has made a batch of biscuits. Her husband pretends to like them, so she delivers the rest to his office. But one bite of these biscuits makes you violently ill, and soon all his visitors (he runs a theatrical booking agency), plus the workmen at home, are ill; when she shows up at the office, they all go after her.
A gang of thieves lure a man out of his home so that they can rob it and threaten his wife and children. The family barricade themselves in an interior room, but the criminals are well-equipped for breaking in. When the father finds out what is happening, he must race against time to get back home.
A contest is being held in Cremona for the best violin, with Giannina's hand in marriage as the prize. Filippo is secretly in love with her, but is also ashamed of being a cripple, so he switches his superior violin with that of another apprentice, Sandro, whom Giannina loves.
It's Bob Allen's twenty-first birthday. His mother and his brother Jack, a policeman present him with a cap, personalized with his initals in the lining. Jack then goes to work and Bob goes out also. Later in the evening, Jack is called to the scene of a robbery, where he finds the cap with his brother's initials. Dismayed by the idea that his brother is a thief, he goes home and confronts Bob with the evidence. Though it breaks their mother's heart, Jack does his duty and leads his brother out in handcuffs.