“Those creatures who cannot die are called Ajin. Those creatures don’t realize that they are Ajin until they’ve “died” once. That’s how it was for me, too.”
Nagai Kei is a very gifted high-school student who got to first place at the national medical school’s mock exam. For his aim to become a great doctor he works harder than anyone else in his class. But one day, as Kei passes the street lost in thoughts, he gets into a traffic accident which should have cost him his life. As a surprise for his classmates and the lorry driver, who had caught him, Kei’s body regenerates and he comes back to life. That’s a bad sign and it can mean only one thing: Nagai Kei is an Ajin! “What the heck is an Ajin?” – Kei doesn’t know the answer, but he knows for sure that he has to run away, otherwise he will end up as a guinea pig. Not much is known about the true number of Ajins or their special abilities, so he would certainly be researched in a laboratory if he gets caught. Terrified and not knowing what to do next, Kei is saved by his friend Kai. Together, they flee deep into a deserted mountain, but Kei doesn’t wanted Kai to stay by his side, because it seems too dangerous for someone who’s not immortal. Later, an underground group of Ajin who are hostile against humans contact Kei. What are they planning and what will Kei’s decision be?
