Kafka hopes to one day keep his pact with his childhood friend Mina to join the Japan Defense Force. But while she's out neutralizing kaiju as Third Division captain, Kafka is stuck cleaning up the aftermath of her battles. Now, thanks to a sudden eligibility rule change, Kafka has one more shot at realizing his dream. There's just one problem -- he's suddenly turned into a kaiju! And even worse, he's made the Defense Force's neutralization list under the code name Kaiju No. 8.