In the second installment of the 20th Century Boys series, a group of friends confronts a powerful cult that is bent on destroying the world. As they delve deeper into the mystery, they begin to uncover shocking truths about their own pasts and the apocalyptic prophecies that haunt them. With time running out, they must gather their strength and find a way to stop the cult before it's too late.

In 1997, a group of friends created a book about a villain who planned to destroy the world. Years later, their fictional story becomes a reality as a mysterious cult arises. The friends must reunite to stop the cult and prevent a dystopian future.

In 20th Century Boys 3: Redemption, the identity of the friend who saved the world as a child is revealed. The group of friends must confront their past and face a new threat to save the world once again.