War in Africa is suddenly sideswiped by the first known "Ajin" Demi-human who after death comes back to life and continues fighting! As more pop up around the globe Governments are capturing them to find out more about them. In Japan Nagai Kai a Highschool boy's world is turned upside down when he's hit by a truck killing him, but instantly he comes back to life! He just wants to be left alone but now he's the most wanted person in Japan being the third reported Ajin out of a worldwide population of 46 known, the government wants him. And he has to run!