Fact1: Shinichi continues to track down with help from Migi, Fact2: Tamiya urges him to stop getting involved for sake of safety, Fact3: Kuramori Despite goes resulting in death at Tamiya 's hands Tamiya and Shinichi 's attempts to convince him otherwise, Fact4: Hirokawa himself turns out to be human, Fact5: remaining parasite turns out to be powerful for team
Output: The police use serial killer Uragami to identify parasites among humans, as he has a special ability to detect them; however, he is unable to correctly identify Shinichi Izumi. A few months after the events of the previous film, Shinichi continues to track down and kill the parasites who terrorize the human world for food, with help from Migi, the parasite that infects his right hand. He learns that he is being tracked by Shiro Kuramori, a reporter hired by parasite Ryoko Tamiya. Shiro discovers the truth about Migi, and plans to expose Shinichi. Shinichi tells Shiro that Tamiya is a parasite, and urges him to stop getting involved for the sake of his safety. Tamiya meanwhile, has given birth to her human son and slowly learns how to become a mother, growing furiously protective of her baby and killing her fellow parasites when they threaten him. Despite Shinichis warning, Kuramori goes on to record his conversation with mayor Takeshi Hirokawa, who secretly heads an organization composed of parasites. Hirokawa orders the parasites to kill Kuramori, but they are only successful in killing his daughter. Swearing revenge, Kuramori kidnaps Tamiyas son and calls her to a park so she can see him kill the baby. Despite Tamiya and Shinichis attempts to convince him otherwise, Kuramori almost goes through with his plan, resulting in his death at Tamiyas hands. When Tamiya then approaches Shinichi, the police fatally shoot her. Instead of defending herself, Tamiya protects her child, explaining to Shinichi that she now knows what it is to be human. She hands her son over to Shinichi before dying, reminding Shinichi of his own mother. At the same time, a secret service team evacuates the town hall upon discovering Hirokawas true alignment. They are able to kill nearly all of the parasites as well as Hirokawa himself, who turns out to be a human who supports parasites and distrusts humans. The remaining parasite, Goto, turns out to be too powerful for the team, as his body contains five parasites. He massacres the team and begins his pursuit of Shinichi. Cornered at a forest, Migi sacrifices himself to allow Shinichi to escape. Shinichi mourns Migi and is comforted by his girlfriend, Satomi Murano. The next morning, Shinichi discovers that a part of Migi is still in his right hand, thanks to his body being infected with Migis cells in the previous film. He lures Goto to a disposal facility and is able to fatally injure him. At first reluctant in killing him, Shinichi ultimately decides that he wants to protect his loved ones, and finishes Goto off. Back home, Migi tells a dismayed Shinichi that since the parasites have died down, he will now go into hibernation to achieve an evolution, presumably up to the point where the two will never see each other again, breaking Shinichis heart. A few years later, Shinichi and Satomi visit the now toddler son of Tamiya, who is named Taiki Tamiya. Afterward, Uragami appears, kidnaps Satomi, and takes her to a roof. He states his belief that humans are the real monsters and asks for Shinichis opinion, since he is certain that Shinichi is a parasite. However, with Satomis encouragement, Shinichi defies Uragamis opinion and successfully saves Satomi with help from Migi, who had momentarily awakened from his dormant state to help him.