When parallel universes begin colliding, threatening mutual destruction, Black Panther secretly brings the Illuminati back together. Iron Man, Doctor Strange, Mister Fantastic, Black Bolt, Namor, and Beast search for a way to stop the Incursions before they doom their Earth. But every possible solution confronts them with increasingly difficult moral choices, as saving their world may require sacrificing another. Between old rivalries, secrets, and impossible decisions, the members of the group gradually see their convictions and alliances fracture as the collapse of the Multiverse appears increasingly inevitable.