The film opens with a man (called only "the man" (Yatsu) in the credits, or the "Metal Fetishism" in English{{efn|name=fn1|The name of this character is translated to “Metal Fetishist” in English subtitles, but in the original Japanese credits is listed only as “yatsu”, which translates to “guy”<ref name="midnight">), cutting open a massive gash in his leg and then shoving a large threaded steel rod into the wound. Later, upon seeing maggots festering in the wound, he screams, runs out into the street, and is hit by a car. The driver of the car, a Japanese salaryman (Tomorowo Taguchi), and his girlfriend (Kei Fujiwara) try to cover up the mess by dumping the body into a ravine, but the dumped man gets revenge by forcing the salaryman's body to gradually Shapeshifting into a walking pile of scrap metal. This process starts when the salaryman finds a piece of metal stuck in his cheek while shaving. He tries to remove the metal, but realizes it is growing from the inside.