Their mentor is missing, and the X-Men find their ranks divided between two worlds, both of which teeter precariously on the brink of destruction. Though light-years apart, can the X-Men come together to save both the fervid jungle of the Savage Land and the star-spanning Shi`ar Empire? Or will both worlds - and their mutant defenders - be lost forever?
— Description from Comic Vine community (comicvine.gamespot.com).
