New York newspaper critic Mortimer Brewster is about to marry the preacher's daughter, and he's off to visit his sweet spinster aunts to announce the engagement. Mortimer is the normal one of the eccentric Brewster family. Not only does he have a brother who believes himself to be Teddy Roosevelt, Mortimer's world is rocked when he discovers that his aunts have been poisoning lonely old men for years. In the midst of the mayhem, his other brother, a psychopathic gangster, shows up unexpectedly to add more hysterical complications to the mix. The uproarious farce Arsenic and Old Lace ran over three years on Broadway during WWII and has become one of the most produced American plays of all time.