One morning (or maybe a night) Spirou, Fantasio and Champignac (and Spip) wake up... on the Moon! Enjoying their sleep, Zorglub took them there to reveal his new projects: build the world's most sophisticated laboratory! And take advantage of the lunar environment to carry out experiments impossible to try on Earth. Their anger and their stupefying past, our friends are quickly impressed and seduced by the work of their most faithful enemy. But there is a hidden face to the nobility of these projects: to finance his laboratory without resorting to illegal means, Zorglub had to agree to also install a park of attractions for billionaires... After frowned death by a little escape from a solar eruption, Spirou will discover that there are funny things going on this lunar basis. But who would be better off getting Zorglub's scientific projects out of hand? And who might want to hurt billionaire innocents?