In Amon: Apocalypse of Devilman, the story follows Akira Fudo, a young man who becomes possessed by the demon Amon. As Amon takes control of Akira's body, he becomes a powerful demon known as Devilman.
Devilman must navigate a world filled with demons and humans as he struggles to maintain his humanity while battling his demonic urges. Along the way, he forms alliances with other demon-fighting humans and faces off against powerful enemies.
As the apocalypse looms closer, Devilman must confront his inner demons and make difficult choices that will determine the fate of the world. Will he be able to save humanity, or will he succumb to the darkness within him?