High school student Chen Rui transferred to a strange school. There is an introverted girl in the class who is quiet and even a little indifferent. She seemed to not belong to this world and was out of tune with everyone around her... Her name was Qing Nian. In order to untie Qingnian's heart, Chen Rui took the initiative to approach Qingnian, hoping to understand her rough and broken inner world. However, everything seemed to be self-defeating... Until one day, Qing Nian suddenly disappeared from this world, as if it had been wiped out of thin air. I learned from Qing Nian's mysterious psychiatrist that there is a mysterious monster in this world. They can freely travel through time and space, feed on the flow of time, and distort the reality of history at will... So, does Qing Nian's disappearance have anything to do with the so-called time monster... Chen Rui, who values love and justice, resolutely decides to discover the truth of the matter.