Kafka Hibino has almost abandoned his dream of joining the anti-Kaiju "Defense Force." He now works in Kaiju clean-up, disposing of the bodies of slain Kaiju and thinking back with regret to the days he spent with his childhood friend Mina Ashiro, captain of Defense Force's Third Division.

After transforming into a Kaiju to rescue Reno and Iharu, Kafka is found by Hoshina, who immediately attacks him.

When the Defense Force is in danger, Kafka is forced to choose between keeping his secret and saving his comrades.

Kaiju No. 8 is captured, and Kafka is at the mercy of the Defense Force's most important leaders.