The daughter of an American diplomat is forced to spy for Mexican revolutionaries.

Phyllis Narcissa, an underpaid children's librarian, eagerly accepts a dinner invitation from Horace de Guenther, one of her patrons, and happily entertains his invalid wife. Later, Mrs. de Guenther encourages Phyllis to meet with Mrs. Harrington, a dying rich woman whose son Allan, once a vigorous young man, was paralyzed in an auto accident. When Mrs. Harrington proposes to the librarian that she marry and take care of Allan in exchange for his wealth, Phyllis reluctantly consents. While struggling to cheer up the eternally gloomy Allan, Phyllis welcomes the visits of his friend, a doctor who informs her that her husband's paralysis may be psychosomatic.