After the events of Spider-Man: Far From Home, Peter Parkerβs life is turned upside down when his secret identity as Spider-Man is revealed to the world by the villain Mysterio. The public exposure leads to widespread chaos, as Peter and his loved ones face scrutiny, danger, and legal troubles. In an attempt to restore some normalcy to their lives, Peter seeks the help of Doctor Strange, hoping that a spell could erase the memory of him being Spider-Man from everyoneβs minds. However, the spell goes terribly wrong when Peter keeps altering the conditions, resulting in a rift in the multiverse, which causes villains from alternate universes to enter their world.
The appearance of dangerous foes from other realities, including Doctor Octopus, Green Goblin, Sandman, Lizard, and Electro, forces Peter to take action. He initially attempts to send the villains back to their respective universes but learns that doing so would lead to their deaths in their original worlds. Rather than accepting this fate, Peter decides to try and cure them, bringing them into his universe for treatment. This decision leads to tension between Peter and his friends, MJ and Ned, as they help him navigate this dangerous situation. However, things spiral out of control when the villains escape, and the consequences of Peterβs actions put both the multiverse and his loved ones at risk.
In the final act, Peter realizes that the only way to stop the chaos and protect the people he loves is to make an unimaginable sacrifice. He asks Doctor Strange to cast a spell that will make everyone forget him entirely, including MJ, Ned, and even Aunt May. This painful choice ensures that the multiverse is repaired, but it also means Peter loses all connections to those he cares about. The film ends with Peter, now alone and without his previous life, fully embracing his role as Spider-Man. With a new sense of responsibility, he begins a new chapter in his life, ready to face whatever challenges the multiverse may bring.