Two young mutants take on the X-Men’s greatest foes single-handedly, in this breakneck superhero adventure from the extraordinary realm of Marvel comics It’s exam time at Xavier’s Institute, and young mutants Tempus and Triage are barely surviving the Danger Room. Newly teamed up for a solo X-Copter flight exam, they approach Chicago unaware that Sentinels – giant Mutant-hunting robots – have attacked the Field Museum of Natural History. When they receive an SOS from the notorious Sabretooth, requesting help for wounded anti-mutant politician Graydon Creed, Triage is all for calling it in. But Tempus sees an opportunity to test their healing and time-manipulating powers for real. Whether it’s a trap or a chance for peace, the two students face their greatest challenge, and the X-Men’s worst enemies.