After discovering he's an immortal Ajin, Kei Nagai knows he'll be hunted, so he reaches out to the only person he can trust.

As Tosaki takes charge of the government's search for the new Ajin, Kei and Kaito are attacked by thugs who are eager to claim the reward money.

Kei begins to embrace his abilities as an Ajin after being driven off the road by a motorcyclist; Izumi visits Kei's sister to learn about his past.

Izumi fights back against the figure in Eriko's hospital room; after parting ways with Kaito, Kei receives a mysterious invitation.

As Kei suffers through horrific experiments at a government lab, Tanaka urges him to unleash his dark side; Sato plots a rescue mission.

When Sato begins slaughtering workers at the lab, Kei jumps in to stop him and learns that Ajin have one key vulnerability.