A car accident caused the death of the CEO's wife, Cheng Youan, but accidentally caused her soul to pass through to Qi Nian'an, an 18-year-old high school student. After losing her memory, she entered the Gu Group as an intern based on her strength, but was recognized by Gu Yunshen, the CEO who was rumored to love his wife as much as her life. For four years, Gu Yun was trapped in grief and became paranoid; after their reunion, he worried about gains and losses and just wanted to hold her in the palm of his hand. And she, in the intertwining of memory fragments and reality, gradually understood his affection and madness. When the conspiracy surfaced and the mystery of their identities was revealed, the lovers, who spanned life and death, finally used obsession as a guide to renew their relationship.