Who will save Mars? Arakko's mutants have spent millennia in the war, but on the planet called Mars, they will learn to live in peace. Tornado is responsible for the transition but Abigail Brand has other plans. Vulcan is unstable, Cable has secrets... Will the red planet be able to remain peaceful for a long time? Al Ewing, the prolific author of Immortal Hulk and Immortal Thor, takes the X-Men into space and explores the new status quo of Mars, a planet colonized by the mutants. A series that offers another look at the universe imagined by Jonathan Hickman and is impacted by the crossover Judgment Day.