Zhou Yun, a 23-year-old newcomer in the workplace, was forced to live under the same roof with her nominally 18-year-old "brother" Shen Luochen after her parents remarried. Shen Luochen looks like a pure and perfect boy with excellent grades on the outside, but inside he is a yandere who is crazy possessive of his sister. He worked step by step, pretending to be paranoid with innocence, and weaved a gentle trap to trap his sister tightly. In the end, the two reached their own mutual salvation through distortion and healing.
