A mysterious visitor collapses in Hercule Poirot’s apartment with a terrifying warning about a secret organization known only as “The Big Four.” As Poirot and Captain Hastings begin to investigate, they uncover a powerful international conspiracy involving espionage, manipulation, and a shadowy group determined to control world events from behind the scenes. Facing one of the most dangerous challenges of his career, Poirot must rely on his brilliant intellect and keen instincts to expose the truth. Join us as we dive into Agatha Christie’s thrilling novel “The Big Four,” a globe-spanning mystery filled with intrigue, danger, and unexpected twists.