Mortimer Brewster, a newspaperman and author, is initially opposed to marriage, but he surprises everyone by getting hitched at city hall. However, his honeymoon is short-lived as he must rush home to inform his two eccentric maiden aunts. Upon arrival, he discovers their dark secret: they have a peculiar hobby of murdering elderly men and burying them in their cellar, and things only get more sinister from there.
Arsenic and Old Lace
A celebrated author of marriage-themed books takes a surprising step by getting married, only to discover on his wedding day that his endearing aunts, who have always been a source of comfort, have a dark secret: they're serial killers.