The Tower of Ivory by Gertrude Atherton

The Tower of Ivory follows Margaret Hill, a singer whose talent attracts Al Levering. He rescues her from the notorious dive in which she is performing and pays for her musical education. Just as she is about to join an opera company, Levering is arrested for embezzlement and Margaret, out of gratitude, promises to marry him when he is released. But is marriage to a criminal to be her fate?