It tells the story of an extreme sadomasochism that started on campus and is engraved in the soul. Su Wanwan, a 20-year-old girl from the Academy of Fine Arts, has a charming face that hides the ingratiation and cowardice born from childhood trauma. Behind the academic aura of 28-year-old biology professor Gu Yanzhi is the paranoia and desire for control bred in the shadow of his family. An unexpected collision in the laboratory, and his tenderness in holding an umbrella for her were the beginning of her fall and a carefully woven cage.
