After accidentally adding “Yin Yang Q,” a QQ account with the same number as her own, Dou Xiaowei meets Lang Yuwu, who is said to have died in an accident. To win back his girlfriend, Li Mengmeng, Xiao Nanxing uses a hacker to stage a fake haunting, offering Dou Xiaowei to Lang Yuwu as a “sacrifice” to get himself out of trouble. Heartbroken when she learns the truth, Dou Xiaowei nevertheless falls for Lang Yuwu as they spend time together. Meanwhile, the truth comes out about Lang Yuwu’s accidental death: Liu Yanchao’s jealousy and Wang Siyu’s misunderstanding were to blame. In the end, Lang Yuwu sacrifices himself to protect everyone, his soul vanishing completely. Years later, Dou Xiaowei stays on at the school, waiting, and unexpectedly receives a reply from Lang Yuwu on QQ.
