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... (more) 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.