"Who are you when no one is around?" Lin Yi was a distinguished painter, who used the pseudonym He in his works. After the death of his brother in a tragic accident, Lin loses his motivation and gives up his artistic life. In an attempt to end it all, he climbs to the roof of the building where he lived, not expecting to find someone willing to show him the light he thought he had lost forever. Four years later, he meets this person again, who promises to bring him back to his artistic life.