In a world where mysterious beings known as "Ajin" walk among humans, a high school student named Kei Nagai discovers he is one of them after a fatal accident reveals his immortality. Fearing capture by the government, Kei is thrust into a dangerous game of survival as he navigates a world filled with Ajin hunters and powerful forces seeking to control his abilities. With the help of a few unlikely allies, Kei must learn to master his newfound powers and uncover the truth behind the Ajin phenomenon before it's too late. As Kei's journey unfolds, he must confront his own morality and the consequences of his actions, all while facing the ultimate question of what it truly means to be human. "Ajin" is a thrilling and suspenseful anime series that delves into the darker side of humanity and the price of immortality.