Artist playboy Dickie Nugent (Cary Grant) appears before beautiful judge Margaret Turner (Myrna Loy) for fighting at a nightclub, and charms her into dismissing the charge. That same day, Dickie happens to lecture at a high school, where Margaret's teenage sister, Susan (Shirley Temple), falls head-over-heels for him. Things get complicated when Susan sneaks away and is found in Dickie's apartment, and downright zany when he is court ordered to date the teen as a way of easing her attraction.