An alien named "Mozart" appears in the lives of a father and son who can never see eye to eye. Ren Da Wang wishes for his astronomy enthusiast son Ren Xiao Tian to become a pianist and their differences have become a source of their constant quarrels. One day, the mysterious alien Mozart appears before them. Mozart helps Ren Xiao Tian in a "battle of wits and courage" against his father. What Ren Xiao Tian never expected was that Mozart has come to earth because of a mission.