Millie Wilson, a simple country girl, comes to New York, with a valise, bird cage and a note for her aunt, asking her to take care of her, her mother having died. She reluctantly takes in the daughter of her sister, installing her in the kitchen. One night, Millie is hurriedly sent to the residence of a society woman with a Cinderella costume. The lady scolds Millie and sends her back with the dress. The girl sits on the adjoining stoop, afraid to go home. The husband of the society lady, sees Millie and pities her in her plight. He gives her the money for the dress, and tells her to go to the mask ball herself. Millie has a great time at the ball, where she meets her Prince Charming. At twelve o'clock Cinderella (Millie) flies from her lover. Prince Charming tries to find his Cinderella. The rest is too good to tell. Just see it.