Arsenic And Old Lace by Joseph Kesselring

Set in the quaint Brooklyn home of the Brewster family, this dark comedy revolves around the seemingly sweet and charitable elderly sisters, Abby and Martha, who have a peculiar hobby of poisoning lonely old men with arsenic-laced elderberry wine. Their nephew, Mortimer, a drama critic, discovers their macabre secret and is thrown into a whirlwind of chaos as he attempts to navigate his family's eccentricities, including his brother who believes he's Theodore Roosevelt and another brother who is a criminal on the run. The play humorously explores themes of madness, murder, and the thin line between sanity and insanity, all while maintaining a light-hearted and farcical tone.