Writer and notorious marriage detractor Mortimer Brewster (Cary Grant) falls for girl-next-door Elaine Harper (Priscilla Lane), and they tie the knot on Halloween. When the newlyweds return to their respective family homes to deliver the news, Brewster finds a corpse hidden in a window seat. With hi
s eccentric aunts (Josephine Hull, Jean Adair), disturbed uncle (John Alexander), and homicidal brother (Raymond Massey), he starts to realize that his family is even crazier than he thought.