Officer Mai Kawai has had enough! She’s sick of being a police officer—but just when she’s about to hand in her resignation, the arrival of a brilliant (and beautiful) ace detective named Seiko Fuji changes her mind. Will Fuji reignite Mai’s passion for policing? And will Mai uncover the mystery of why Fuji was transferred to this ordinary police box?

Sequel to the 2018 animated series SSSS.Gridman and the third installment of the Gridman multimedia franchise.

When Yomogi Asanaka, a first-year student at Fujiyokidai High School, meets Gauma, he claims to be a "kaiju user." But the appearance of a kaiju followed by the entry of the gigantic robot, Dynazenon, backs up his mysterious words. After ending up in the wrong place at the wrong time; they get dragged into the desperate fight against the kaiju!