Als Sato beginnt, Mitarbeiter des Labors abzuschlachten, schreitet Kei ein, um ihn aufzuhalten. Dabei realisiert er, dass Ajin einen wesentlichen Schwachpunkt aufweisen.
Sato suspects that something is different about Kei and when Sato starts to kill helpless surgeons, Kei objects and kills Sato. In the Ajin research centre, Ikuya Ogura tries to explain the Black Ghosts and Yu Tosaki insists that Izumi Shimomura stay by his side to protect him. Sato hunts Kei to kill him permanently, but Kei decides to help the surgeons escape and act as a decoy. He attacks Sato, but fails and as Sato is about to kill Kei, Kei’s Black Ghost appears and kills Sato. As Kei and the remaining surgeon try to escape the installation, Sato again catches them, so Kei calls his on his Black Ghost but so does Sato. The Black Ghosts attack each other, and neither wins, but the distraction enables Kei to escape to the nearby river.
Kei tente d'arrêter Sato qui commence à massacrer les employés du laboratoire. Il découvre alors que les Ajin ont un point faible clé.
Sato comincia a massacrare gli impiegati del laboratorio e Kei interviene per fermarlo, scoprendo che gli Ajin hanno un punto debole.
사토가 연구실에서 직원들을 학살하기 시작하자 그를 저지하기 위해 케이가 뛰어든다. 케이는 아인에게 한 가지 치명적인 약점이 있다는 사실을 알게 된다.
Sato comienza una matanza en el laboratorio y Kei llega para detenerlo, justo cuando descubre que los Ajin tienen un punto débil muy importante.
Sato começa a assassinar pessoas e Kei tenta impedi-lo, descobrindo assim algo novo sobre os Ajins.
