Scott finds out his younger brother Alex Summers, who he believed dead, is alive and maybe soon recruited by Magneto to join him as the X-Men are forced to fight the Brotherhood for a place in Magneto's sanctuary.
As mysterious metal pods appear, picking up mutants one at a time, Cerebro detects a new mutant in Hawaii, Alex Summers, Scott's believed-to-be deceased brother. In a race to get to Havok before Magneto can recruit him, the X-Men are forced to fight the Brotherhood for a place in Magneto's sanctuary.