Young Terwilliger, an orphan boy in New York City, "adopts" Old Archer, the caretaker of Gramercy Park, after the man is arrested for beating Terwiliger for picking a flower for his dead mother. As Terwilliger grows up, he falls in love with Helen Raymond, a pretty neighborhood girl, but finds a rival for her in Harvey Livermore. When World War I breaks out both boys enlist in the army and are sent to the front lines. Complications ensue.

Janet Loring is a young widow with a young son. She marries millionaire Malcolm Trask, but doesn't tell him about her previous marriage or her son, Ranny. Abandoned to the streets by Janet, Ranny eventually moves in with a bookseller and her granddaughter Margy. As the years go by Janet comes to regret abandoning her son and takes out ads looking for him. Marcio, a vicious blackmailer, sends Ranny to Janet posing as her son, not knowing that the young boy actually is her son. Complications ensue.