The farcical black comedy made famous by the film adaptation starring Cary Grant and directed by Frank Capra.
Story:
With two spinster aunts who have taken to murdering lonely old men by poisoning them with "just a pinch" of cyanide, a brother who believes he is Theodore Roosevelt, and a murderous brother who got plastic surgery to conceal his identity, Mortimer Brewster needs to save his crazy family from falling into the hands of local police and decide whether or not to go through with marrying the love of his life.
Fun Fact
The "murderous old lady" plot line may have been inspired by actual events that occurred in a house on Prospect St in Windsor, Connecticut, where a woman, Amy Archer-Gilligan, took in boarders, promising "lifetime care," and poisoned them for their pensions.
New York Daily News