An accident took away the lives of his mother Su Ling and his unborn sister. From then on, the 16-year-old boy Lu Xiaofei and his father Lu Zhongliang depended on each other. Suddenly one day, the little girl in the dream climbed into bed from the sewer and refused to leave. Unable to figure out whether the other party was a human or a ghost, Lu Xiaofei signed an agreement with Zilaishu's "sister": You walk into my dream and I will possess you. This is a story about life and redemption triggered by an accident, a little absurd, a little ridiculous, and a little bit love.