Revolution is over. The war has begun. Cyclops and his Uncanny X-Men are tired of the hunt. After another near-fatal Sentinel attack, they take the fight to S.H.I.E.L.D. Maria Hill claims she doesn't know who's building the Sentinels - but she hasn't stopped them, either. She's relying on Dazzler, S.H.I.E.L.D.'s mutant liaison, to help defuse the situation. But Dazzler lies incapacitated in Mystique's headquarters -and Mystique makes a convincing imitation! And where is Magneto, the former head of the mutant movement?