The ISS, the International Space Station has gone silent. The crew is in distress. Simultaneously, a wax-covered decapitated body is found on a roof in Kazakhstan. Positive identification leaves no room for doubt: the body belongs to an American astronaut currently on a mission on the ISS. A French astronaut, Anna Zarathi (Céline Sallette), dismissed from the space program, and a Kazakh cop, Isaak Turgun (Daniyar Alshinov), cast aside by his superiors, set out to solve this mysterious paradox...