In a world plagued by massive monsters known as kaiju, childhood friends Kafka Hibino and Mina Ashiro make a vow to join Japan’s Defense Force and protect their homeland. Years later, Mina has risen to become a powerful officer, but 32-year-old Kafka has long abandoned his dream, now working a dead-end job cleaning up the aftermath of kaiju battles. His life takes an unexpected turn when a bizarre encounter with a rogue kaiju grants him the ability to transform into one of the very monsters he once feared. Branded as "Kaiju No. 8" by the military, Kafka now stands at a crossroads—hunted as a threat yet determined to fight for humanity. With the help of his ambitious new ally, Reno Ichikawa, he sets out to prove that even a kaiju can be a hero.
Kaiju No. 8 (Monster #8) is based on the hit manga series written and illustrated by Naoya Matsumoto.