Back in the real world with no memories of Borderland, Arisu and Usagi encounter Ryuji, a professor with a fixation on near-death experiences.

The first game begins at a shrine. Arisu and the other players must solve math problems on the fly before everything goes up in flames.

As Rei's plan unravels, Arisu takes a risky move to keep his team alive. On a separate stage, Usagi and Ryuji face a relentless barrage of lasers.

With time running out and a crash imminent, Usagi's group must jump trains to survive. An explosive game of Kick the Can awaits Arisu's team.

Arisu follows his digital double through a simulation of future Shibuya, stopping at a heartwarming scene — and the real Usagi before him.

Haunted by a devastating glimpse into the future, Arisu crumples under the pressure to save everyone. Will he, Usagi and the team make it to the exit?