Humanity is suffering from a series of mysterious murders across the globe, known as the 'Mincemeat murders'. High school student Izumi Shinichi has a parasite living off him, having replaced his right hand, and he might be the discoverer of truth.
Humanity is under attack by human-mimicking flesh-eating alien parasites. One parasite bonds with his young high school student host, and he convinces the parasite to help him stop the others.
Story continues with the students' own conflicts, Koro Sensei’s identity and the fate of the world. The time limit for assassination is approaching.
