This ruse lands her in jail, where a fellow custodian is Harry Disbrow, a wealthy young man who has been arrested for drunkenness.

Harry is rapidly released, and, having taken an interest in Mary, he finds her employment in his parents' home as a servant.

At a ball given to celebrate this engagement, Mary decides to don a dress of Maud's and attend; Mrs. Disbrow passes off the girl as her niece.

It transpires that Maud's father, George Horton, has been systematically robbing from the family, including stealing a bundle of securities from a safe during the ball.

In gratitude for her bravery and for saving the family's fortunes, the Disbrows approve of Mary's marriage to Harry.