The next day, Tintin wakes up in a hospital room with his bedside Dupont and Dupond the inspectors. His injury is benign. The manager confirmed that the ball simply slipped on a coast. During the interrogation headed by the two policemen, Tintin learns that an unregistered aircraft crashed overnight at Eastdown in Sussex. It must nevertheless be the reporter to link with the unit broke down the day before and put a premature end to his recovery by embarking on this new case on the first train in the direction of Eastdown ...
In this work, Hergé offers a scenario that included Tintin and Snowy in the heart of a case concerning trafficking of counterfeit money. The two heroes are here confronted with a network of dangerous criminals who do not hesitate to kill. The young reporter had experience from the start and believes to anticipate the wishes of two castaways from the sky. The plot, in fact, relies on multiple actions carried out in the context of exotic Britain. Besides the suspense effect provided by a series of unexpected twists as each other, the pace of the story is embellished picturesque variations of the decor in which the characters of the French countryside rugged landscape of the Scottish coastline . Finally, the thickness of the mystery in which the young investigator located increases with superstitious beliefs that characterize among other British customs. However, Hergé is played with irony of this phenomenon by making the black beast terrorizes the island that Scottish fishermen a caricature to which he gave the traits of a timid and clumsy gorilla, which will help even Tintin solve its investigation.