Back from their adventures on Zorglub's lunar base, Spirou and Fantasio find themselves in a new pickle. Spirou Magazine is being sued for immorality and irresponsibility. The punitive damages bleed the coffers dry, and the two reporters have no choice but to sign a contract with an American corporation, the Viper, to bail the magazine out.

But Spirou soon discovers that they've been tricked, and that in one stroke of the pen, he may have signed away his whole life!