Jaxon Moore's struggling arcade bar faces a financial crisis and potential shutdown this holiday season. When his estranged sister Tina, once a rising singer, dies in a car accident, Jaxon is contacted to take legal guardianship of her daughter, Harmony, or she’ll enter foster care. Tina left a trust fund for Harmony, accessible by her guardian. Seeing a lifeline for his business, Jaxon steps up to care for Harmony, but her estranged father reappears, seeking custody to claim the money for his music career. Harmony, however, only longs for her mother and the holiday traditions they shared, especially their love for singing together.