Facing a series of complex murder cases, new police commander Hélène Bach must learn to work with the brilliant yet exasperating Raphaël, who can make the dead speak like no-one else.

2053. Four astronauts, assisted by a robot, are on a two-year mission in an subterranean base on Mars. An unexpected discovery puts them face to face with a grave responsability with regard to Earth. They then start falling prey to violent hallucinations.