Wealthy playboy Grant Van Gore means to have his way with his beautiful maid, the innocent Hattie Lou. He swears his love to the naive girl, and in an act so heinous as to defy belief, has the captain of his yacht perform a fake marriage ceremony. He ruins poor Hattie Lou, and then abandons her ashore the very next morning. A year later, the destitute girl and her starving baby are wandering the streets. When she sees a newspaper headline announcing that Grant has drowned at sea, Hattie Lou hatches a desperate plan for survival. She will present herself to the wealthy Van Gore's, who cannot fail to provide for their late son's widow and child!
Gordon Kingsley lives happily with his wife Dorothy and little daughter Mary Jane. On visiting the home of San Francisco architect Frank Mason, he is shocked to discover a portrait of his own wife and daughter. Suspecting the worst of Dorothy, he hires a private detective....
Mary Beth rents an attic room to Richard, a composer. Frustrated with the publishers demands for cheap, trashy songs, Richard, penniless, tries to asphyxiate himself, but Mary intervenes, encouraging him to go on. Mary finds his song, and secretly sells a song she finds of his, "The Rainbow Girl", to a publisher, later finding out that she, herself, is the Rainbow Girl he wrote about.
