When we left Shinichi (Shota Sometani) and his inseparable parasite companion Migi at the end of Takashi Yamazaki's 2014 sci-fi/horror hit "Kiseiju" ("Parasyte: Part 1"), the space-alien organisms who had found human hosts in the city of Higashi Fukuyama were not only slaughtering humans for food — with tentacles that snapped like whips and cut like knives — but organizing for what looked to be a takeover of the planet, with City Hall as a base and the newly elected mayor (Kazuki Kitamura) as a creepily smooth frontman.
How can one high school kid, albeit one with parasite-like fighting powers (courtesy of Migi, the alien organism living in his right hand), hope to stop them? But in Yamazaki's follow-up, "Kiseiju Kanketsuhen" ("Parasyte: Part 2"), a glint-eyed Shinichi goes out fearlessly to hunt for parasite prey in revenge for a certain parasite outrage in "Part 1."
His sweet-but-feisty girlfriend Satomi (Ai Hashimoto) fears he is slipping away from her, and Shinichi himself is disturbed by the changes he senses. Is he doomed to devolve into a one-of-a-kind hybrid — human in appearance, but an emotionless parasite at heart?