Lady of the Night.

The story of two baby girls, born near in proximity but worlds apart in society: Molly Helmer, the daughter of a thief, and Florence Banning, the daughter of the judge who sent Molly's father to prison. The girls' lives come together as they reach the age of eighteen, when Florence leaves the security of the exclusive Girls Select School, and Molly, now orphaned, begins her life after reform school.