After finding a young man's remains, Léa wakes up in the 90s and body swaps seven times as she tries to solve the mystery of his death — and prevent it.
The ISS, the International Space Station has gone silent. The crew is in distress. Simultaneously, a decapitated and waxed 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, dismissed from the space program, and a Kazakh cop, disowned by his ranking hierarchy, set out to solve this mysterious paradox.
The first manned mission to Mars is now approaching the red planet. The crew includes top-flight scientists and a young female psychiatrist, responsible for their mental health. But just as they are about to land, something goes wrong.