Director Hitoshi Matumoto weaves this darkly comic mockumentary about a Japanese man who continues the long-standing family tradition of facing off against Tokyo's most formidable monsters. Constantly caught in the middle of everyone's battles, Dai Sato finds his sincere efforts to keep the peace repeatedly belittled; he's divorced, his neighbors have covered his house in graffiti, and he gets nothing but dirty looks when he walks down the street. When we first meet Dai Sato, he is the subject of a television documentary. Though on the surface Dai Sato may seem like your average, slightly unkempt salary man - completely unremarkable in all respects - it soon becomes apparent just how deceiving first impressions can be. After lamenting on camera the fact that he never gets any vacation time due to frequent calls from the Defense Department, the camera follows Dai Sato as he rides his motorbike to a Tokyo power plant, receives the jolt of electricity that transforms him into a hulking super-human crime fighter, and clashes with a gargantuan leviathan intent on destroying Tokyo. Dai Sato comes from a long line of heroic heavyweights, yet while his ancestors were once championed with parades for their noble efforts, public interest in giant invaders has waned and Dai Sato has become something of a joke to the citizens of Tokyo. Not only is noise generated by Dai Sato's battles regarded as a public nuisance, the property damages that he causes while defending the city has the citizens downright angry. Now, as Dai Sato attempts to balance his responsibilities to his ex-wife, his daughter, his agent, and his senile grandfather, the crushing weight of both his personal and professional obligations simply becomes too much to bear.