Mary Collins (Deanna Durbin) is a disc jockey on a local radio station who suddenly finds herself accused of being the mistress of a rich old man, Henry Reed. Outraged at the very suggestion, Mary digs deep into her family background and discovers that her aged aunt has a shocking secret! As the scandal grows, relatives of Mary's supposed 'Sugar Daddy' kidnap her to shut her up. Of course, to a feisty girl like Mary, this means war! She pretends that all the scandalous rumours are true and the wealthy Reed family had better come up with some serious hush money pronto!