This is it! The cataclysmic conclusion to the Crossing Line storyline! No less than 15 super-heroes and 3 super-villains are trapped in the dimensional nexus…with enough radiation to make eastern Canada uninhabitable for the next 50 years! But that's not their biggest obstacle at the moment! It's getting past the Combine! The two Russian terrorists that have become fused together by the nuclear explosion on the Waterwind! The mightiest heroes including the Crimson Dynamo, Guardian, Perun, Quasar, and the Vision tackle the Combine; while Shaman, Fantasma, Puck, and Captain America try to keep the nexus portal open and aid the dying civilians! The situation is so dire that even Tyrak, Orka, and Merrano pitch in to help! Will the Avengers, Alpha Flight, and the People's Protectorate find the path to salvation?