-Heavy suspense plot- Shinichi has settled as a professor 17 years after the end of his Parasitic adventure with Migi. His only concern now is his one student- 17 year old Shuuya Fujisaki who refuses to leave him alone because he suspects Shinichi to be hiding away a secret- the Parasyte secret. And as events unfold, Shinichi finds a horrid truth mushed up with his past opening up