曼哈顿的槲寄生Lucy and Joe whose married life is on a verge of a divorce gets the surprise visit of Mrs. Claus in disguise. Mrs. Claus is on a mission to find the true spirit of　　Christmas that can inspire Santa Claus. Both Lucy and Joe are consumed by their professional commitments. Lucy's interest in her boss Parker makes things more　　complicated. Can Mrs. Claus accomplish her mission and spread the joy of Christmas.