Lin Yu's school often had people die in accidents, and he either knew or had seen the people who died. I always feel that those people are somehow related to me.
What seemed like an accidental death was actually caused by a murderer hiding behind Lin Yu. This murderer was none other than his younger brother, Lin Shu, the adopted son of the Lin family.
Why did Lin Shu, that quiet and good-looking boy, his most beloved brother, become a murderer? Lin Yu discovered the truth behind this through a notebook - the murderer's notebook.