The ordinary and kind-hearted heroine Su Tian accidentally saves Li Moyuan, a yandere boss with a mysterious life experience and paranoid personality. Li Moyuan fell in love with Su Tian at first sight and believed that she was the only light and salvation in his life, so he immediately launched the ultimate "captive style" sweet pet offensive. Su Tian's life was completely overturned. She not only had to deal with Li Moyuan's suffocating possessiveness, but also faced the difficulties and frame-up of her childhood sweetheart Lin Yao, as well as the untimely "rescue" action of her friend Zhang Manman, which all caused a series of profound misunderstandings between her and Li Moyuan. Amidst the many crises, misunderstandings and morbid sweetness, Su Tian gradually discovered the pure affection and unknown vulnerability under Li Moyuan's paranoia, and the emotions were repeatedly pulled between fear, resistance, dependence and love. In the end, after experiencing the test of life and death and the crisis of trust, Su Tian gradually understood and partially accepted this unique love, and found her own self-worth in this ultimate emotion and a way to coexist with Li Moyuan.
