Adele has grown up in a tenement, but she longs for greater things. She gets her chance at the stage when her mother runs into an old friend, Blanche. Blanche has been working steadily in the theater, and she helps Adele get work. The young girl finds romance with Vincent Harvey, an aspiring composer. One day Adele suffers an accidental fall out of a window.

Margaret Case seeks to live down the errors of the past, and in marriage finds happiness and security until her enemy again crosses her path and she realizes that life is like a house of glass where there is neither security nor seclusion.