Li Yanxi died unexpectedly after an acrimonious breakup with Gu Huai. Three years after his death, he watched his ex-boyfriend become famous and find a new love, and the obsession in his heart was hard to get rid of. She asked the King of Hell for a chance to possess Gu Huai's current girlfriend Lin Hanzhi, and returned to Gu Huai to spend seven days with him. She saw with her own eyes how gentle and considerate Gu Huai was to his current wife, compared with his previous indifference and perfunctory treatment of her, which was a mixture of love and hate. In the end, before the seven-day countdown ended, she fulfilled her unfulfilled wish and chose to forgive and let go. Gu Huai finally faced the guilt and deep love in her heart, and the ending was heartbreaking and regretful.