Book is in French At 16, Luk Zau Gam sees his life turned upside down the day he discovers that he is an arthropodian. Representatives of this species, which resemble humans but have attributes specific to arthropods, are ostracized and live in miserable conditions. Luk's sudden transformation exposes him to a multitude of dangers, until he crosses paths with the Astronaut, a wealthy businessman who offers his help. The latter wishes to recruit him as a candidate for the Orion Program, a project which aims to prove the value of arthropodians in society. What if this opportunity allowed Luk to tame his new nature?