Mikkel, a 13-year-old boy from Denmark, embarks on a life-changing journey to Mars as part of an international space mission.

When a catastrophic malfunction leaves his crew stranded on the Red Planet, Mikkel must rely on his scientific knowledge, resourcefulness, and quick thinking to repair their ship and survive the harsh Martian environment. As he uncovers mysterious alien signals beneath Mars' surface, Mikkel discovers that the planet may hold secrets capable of changing humanity's understanding of the universe forever.

But, as strange phenomena unfold, Mikkel must face the possibility that something-or someone-might already be there.