Catastrophe: Spirou's newspaper is threatened with bankruptcy following a resounding trial! The editor-in-chief, Fantasio, does not want to let his magazine die. But he is not the only one: Gil Coeur-Vaillant, the famous detective-explorer and admirer of Spirou's exploits, will come to his rescue. He will find an investment fund, the VIPER, which will replenish the newspaper. Uf! The famous weekly is saved! Not quite, because Spirou has actually fallen into the claws of an unscrupulous billionaire. Prisoner in a dream villa on a paradise island, our hero will not endure this idle life for long. He will rebel, ignoring that he will thus rush his friends into terrible troubles...