Hu Nan went to visit his grandmother, but unexpectedly experienced a series of bizarre events. Hu Nan was extremely confused, unable to distinguish between reality and illusion. With the help of a doctor, Hu Nan gradually regained his memory. Years ago, Hu Nan was injured and saved by Lan Ni, and the two developed a connection. Bandits attacked the village of Yinyang Ridge, and Hu Nan was seriously injured while trying to save Lan Ni. In turn, Lan Ni sacrificed herself to save Hunan. In the midst of Hu Nan guilt and self-blame for Lan Ni, he developed illusions and fabricated this story. In order not to forget Lan Ni, Hu Nan consistently refused surgery, putting his life in jeopardy. Persuaded by the vision of Lan Ni, Hu Nan finally underwent the surgery. Although his surface consciousness had forgotten Lan Ni, deep within his heart, Lan Ni continued to accompany Hu Nan....