Joan, an earnest little orphan who lives in an asylum near the World War I training camp at Plattsburg, reads the story of "Joan of Arc" and soon imagines that she is the reincarnation of the peasant-soldier. As she sits in the cellar reading, she hears voices plotting against the government. She thinks the voices are from another world but they actually belong to a group of German spies. The agents plan to acquire the important invention of a young man named Ingleton, who is staying at the camp under the guardianship of Captain Lane. Joan relates this information to the captain, with whom she is in love, but he at first refuses to believe her. Later, however, he learns that the plot is real, and with Joan's help, he captures the spies.

A resourceful young girl struggles to free herself from slum life.

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.

Georgina asks permission from her old aunt, Patricia Mercer Vanderpyl, to marry Capt. Nugent before his departure for France. Patricia refuses and, in reply to Georgina's questioning, gives her a diary from her own girlhood to read. The diary unfolds the story of Patricia's marriage to soldier Anthony Vanderpyl. Returning on furlough after the outbreak of the Civil War, Anthony suddenly leaves Patricia to visit Mrs. Le Roy, an old flame, and is killed by her jealous husband. Positive that Anthony had been unfaithful to her, Patricia refuses to open the letter that her husband sent her on the day of his death. Georgina now opens it and discovers that Anthony had gone to Mrs. Le Roy to end the affair that his brother Bentley was having with her. With this revelation, Patricia sanctions her niece's marriage, then dies, joining Anthony in "the spreading dawn".