The Avengers, led by Iron Man, Thor, Vision, and the new Captain America descend on Los Angeles overrun by plants. It’s a scheme by Plantman to strike against the human world on behalf of the world’s flora. The heroes battle the quick-spreading vegetation but soon are fighting with one another, first verbally, then with their powers. Thor whacks Cap with his axe, Vision slams Thor through the Quinjet into the ground Cap conks Vision with his shield. Iron Man is the only one to keep control of his mind and he quickly clobbers Plantman; Hulk, however, remembering the events of ORIGINAL SIN 3.1-4, stomps him. Deducing that they are being controlled telepathically, Tony emits a signal which cancels it all out and the heroes return to normal. Tony is contacted by Steve Rogers in New York, telling him that every city on Earth has erupted in hate riots and he knows the Red Skull is behind it….
In Genosha, Havok awakens next to his wife Janet (Van Dyne) and daughter Katie—but it’s a fantasy implanted by the Red Skull and Havok is in a reeducation camp. Outside Magneto, Rogue, and Scarlet Witch are engaged in battle with the giant Red Onslaught, who is able to wield Professor X’s telepathic powers against them. The Skull slowly takes over Wanda’s mind, turning her to his side. Havok arrives—and blasts Magneto into a building, where he discoverers Cyclops, Quentin Quire, and Genesis prisoners. He frees them but soon they are fighting among themselves. Havok assaults Cyclops for having killed Professor X and is in turn blasted by Genesis, who is speared through the back by the villainous Ahab….
Back at Avengers Tower, protected from Red Onslaught’s mental attacks, Steve and the Avengers plan to go after the Skull once Iron Man has detected his location. Wasp is mourning the loss of the future where she and Alex (Summers) have had a daughter—which was erased by Kang….
In Genosha, the mind-controlled Scarlet Witch is fighting against her friends. Rogue uses her powers to absorb the villain’s consciousness and is overwhelmed by the images of brutality—until the mind of Professor X surfaces to encourage her to fight. Rogue leaps into the fray and carries Wanda away; once safe Rogue talks her through her guilt and self-doubt and they rejoin the battle. Meanwhile, the other heroes are batting each other and Ahab; Cyclops takes a harpoon for his brother. Just as the Red Onslaught looks most formidable, the Avengers arrive—Iron Man, Cap, Thor, Vision, and Hawkeye—to join in. Then X-Men Nightcrawler, Storm, and Colossus show up to take out Ahab; Scott and Alex reconcile and turn against their common enemy. Then more heroes arrive, Beast, Hulk, Iron Fist, Power Man, Dr Strange, Kitty Pryde and many more. Iron Man informs the villain that he is about to cancel out the telepathic message of hate; Red Onslaught informs Tony that he has found in an inaccessible part of Tony’s mind files on the weaknesses of all the other heroes compiled during Civil War—and unleashes the deadly adamantium Stark Sentinels programmed to destroy the gathered heroes….