"The Calcutta Trunk Caper" is a 1947 radio episode of The Adventures of Sam Spade. The story follows a classic detective mystery that starts in San Francisco and ends across the world.

The Setup

• The Client: A panicked woman named Marsha Hopkins hires Sam Spade.
• The Job: She wants Sam to stop her wealthy sister, Constance, from marrying a shady Bulgarian major named Andrea Rodnick. Marsha is convinced the major is a fortune hunter who will murder her sister.

The Mystery

• The Trunk: Sam looks into the major and gets tangled up in a conspiracy involving a mysterious piece of luggage—the Calcutta trunk.