Transfer student Jiang Xinian entered the seemingly glamorous Shengying Middle School with the secret of his father's disappearance. Under the Cherry Blossom Avenue of this century-old prestigious school, buried are the horrific remains of the "Sakura Project" during the Japanese invasion of China - the genetic manipulation project that used living people for experiments has never really stopped, and her father was the core researcher at that time.
Zuo Qingran from the Discipline Inspection Department of the Student Union was the first person to see through her identity. This boy with light eyes always appears in the abandoned school building at midnight, and the purple spots on his arms hint at the mark of his "experimental subject". When Jiang Xinian found a petri dish soaked with cherry blossom specimens in the basement and saw his father's school badge numbered 0617, the gears of the taboo game officially turned.
School doctor Su Wan's purple injection can control the mind. Behind Rule 17 of the school rules is the metal echo of the dissecting table. The cherry blossom badge on each student's collar corresponds to the countdown to life. Jiang Xinian's mechanical watch, Zuo Qingran's copper key, and the electronic door code of the old school building, all clues point to the ultimate conspiracy of "gene matching" - she is the last "perfect experimental subject" left by her father.
In a campus where lies and blood intertwine, two teenagers and girls carrying secrets are forced to form an alliance. They pried open the secret compartment in the principal's office and decoded the experimental log left behind by their father, only to find that the Sakura Project had already penetrated their blood - the so-called taboo game was just a hunting trap set by fate.
