Bai Yu, the heir to the Bai Group, is an Enigma with a special status. She has hidden a ten-year paranoid secret love for the cold and aloof Alpha Shen Qingya. At a dinner party, Shen Qingya was tricked into falling into a susceptible period. Bai Yu approached her in the name of "rescue", but was forcefully used as the antidote by her unconscious sister. After a night of absurdity, Shen Qingya only left a note and pretended that nothing happened.
Until Bai Yu accidentally learned that her sister was pregnant, the secret love that had been buried for ten years finally had an honest reason. She threw away all her reserve, rushed downstairs to Shen Qingya's house, used pheromones to comfort her sister and the child in her belly, and stayed by her side shamelessly. The cold Alpha tried to maintain a distance, but couldn't stop the yandere Bai Qiehei from pressing forward step by step - "Sister, I'm glad it was me that night, and it will only be me in the future." This entanglement that started out of an accident will eventually allow Bai Yu to completely lock the person she has coveted for ten years by her side.