James Bond must investigate a mysterious murder case of a British agent in New Orleans. Soon he finds himself up against a gangster boss named Mr. Big.

Professor Challenger leads an expedition of scientists and adventurers to a remote plateau deep in the Amazonian jungle to verify his claim that dinosaurs still live there.

Industrialist François Delambre is called late at night by his sister-in-law, Helene, who tells him that she has just killed her husband. Reluctant at first, she eventually explains to the…