Mary Grant has a gambling father and a mother who has disappeared. Even though she has been raised in a convent she proves true to her ancestry by running away to Monte Carlo and spending her small inheritance at the gambling table.
Through a forged will, a crook assumes control of a valuable estate. He poses as the brother of a dead man, and endeavors to dispose of the deceased man's two daughters, one of whom is in love with the forger's son.
