In
Les Chapeaux noirs (
The Black Hats),
Spirou and
Fantasio go on assignment for
Le Moustique and travel to USA, on assignment to report on the status of Wild West. Upon arrival they are disappointed to find a modern culture, but by chance meet a man who directs them to
Tombstone, a town with all the western myths intact. In
Comme une mouche au plafond (
Like a Fly on the Ceiling), Spirou surprisingly finds himself levitating in his apartment. This phenomenon turns out to be caused by the wizard neighbour whom Spirou and Fantasio must outwit in order to stop his mischief. In
Les Hommes-grenouilles (
The Frog-Men), Spirou and
Spip take the train to meet Fantasio in the Mediterranean village
Cassis-sur-Mer where he currently lives in his boat while trying his luck in the tourism industry. But as crime flourishes abundantly in the area, they eventually find themselves in a dangerous maritime adventure. In
Mystère à la frontière (
The Border Mystery), the heroes investigate a case currently reported in the papers, hoping to expose a smuggling ring responsible for bringing into Belgium a new drug, "Hicoine". ==Background==