In December 1962, wide-eyed small-town singer Rose Harper arrives in Manhattan expecting to join her mother at a glamorous Broadway theater, only to discover her mother works as an underpaid janitor who fabricated her prestigious executive status. Facing immediate eviction and snobbish backstage bullying, Rose refuses to board a bus home in defeat.
On a bitter Christmas Eve, a mysterious benefactor dressed as Santa Claus gifts her a velvet stocking stuffed with theatrical clues and auditions. Solving each puzzle while dodging ruthless theater producers, Rose battles through grueling stage rehearsals to prove her raw talent, climbing from destitute obscurity toward dazzling Broadway marquee lights.
