An immortal first appeared on an African battlefield 17 years ago. Since then unknown new immortal lifeforms began appearing among humans, and they became known as "Ajin" (demi-humans). Just before summer vacation, a Japanese medicine student named Kei Nagai is instantly killed in a traffic accident on his way home from the hospital . However, he is revived, and used for all kinds of inhuman experiments by the government. One day, two
