This wild comedy pokes fun at the world of pro-wrestling by placing its accomplished wrestler protagonist Koji Taguchi against a giant squid known as the Calamari Wrestler. The Calimari Wrestler not only proves to be Koji's most difficult opponent yet, but also has an effect on several people's personal lives when he becomes the unlikely object of a young girl's affection.

Le nouveau champion de catch au Japon est un calamar. Il va risquer sa médaille contre de nouveaux combattants, tout en essayant de conquérir le coeur de celle qu'il aime...

La trama comico-realistica riguarda un lottatore professionista che, colpito da un male incurabile, si trasforma in una creatura simile a un calamaro. Ottiene il successo sul ring, ma cerca disperatamente apprezzamenti anche al di fuori di esso.