West of Astrub. That morning, while taking the diligence bus, Joris discovers that his Grandpa has a special card that allows him to travel for free on all lines in the city. This "pass", Kerubim earned it in his youth, following a hectic adventure through the Wild West. Assisted by his three favorite accomplices, Crocosec, Kanigroo and Tortue Brutale, he had decided to found a diligence company, the "Crépin Express". The realization of his project depended on the success of his first mission: the convoy of a large shipment of gold...