France, 2039. One night, a group of activists pursued by the state vanish without a trace. Julia Bombarth is one of them. When she awakens, she finds herself trapped in an entirely unfamiliar world: PLANET B.
The film follows two prisoners in the near future who are sentenced to a lifetime of hard labor on a distant planet. As things unravel, they become increasingly paranoid and start to lose a sense of who they are and their past lives.
Two scientists uncover a meteorite impact site in the Arctic tundra, but it kills one scientist and infects the other. A nearby base takes in the lone survivor whilst trying to understand what happened. The lone survivor may not be the person they think she is.