The final movie of the 20th Century Boys trilogy, Redemption, picks up from where the previous movie, Chapter 2: The Last Hope, left off. After spending 14 years in hiding, Kenji Endo (played by Toshiaki Karasawa) comes out of hiding to confront 'Friend,' the mysterious cult leader who wants to take over the world.
The movie follows Endo and his friends who have formed a resistance group to stop Friend's plan, which involves unleashing a virus that will wipe out humanity. As the group tries to stop Friend, they discover that he has always been one step ahead of them and has been manipulating events since their childhood.
The final showdown takes place in a post-apocalyptic Tokyo, where Endo and his friends are joined by other survivors. The group confronts Friend and finally discovers his identity and motive. Friend, the cult leader, is revealed to be one of Endo's childhood friends, Yoshitsune, who was scarred by a traumatic incident and became obsessed with creating a new world order.
As Endo and his friends battle against Friend's followers and army, they also struggle to come to terms with their own past and relationships. The movie is an epic conclusion to the trilogy, with intense action scenes, surprising twists, and an emotional finale.
In the end, Endo manages to stop Friend's plan and save humanity. However, the movie leaves a few questions unanswered, leaving room for interpretation and speculation about the characters' future. Overall, Redemption is a gripping and satisfying end to an epic trilogy.