In a future city "Hengcheng" where emotions are used as energy and currency, citizens are required to abandon intense emotions in order to maintain absolute order. Lin Mo, a former genius who was deprived of emotions and existed like an "empty shell", made a living by cleaning up the remaining emotional garbage of others.
When a strange "emotional plague" swept across the city, driving people into uncontrollable madness, Lin Mo discovered that he was the key to solving the mystery. A mysterious relic in his hand not only resonated with his broken heart for a long time, but also pointed to the source of the plague.
In order to find his lost self, he is forced to cooperate with an underground resistance organization hungry for true emotions, while facing a ruthless pursuit from the city's ruler - his former mentor.
When the truth was revealed layer by layer, he discovered that the plague was not simply out of control, but a crazy plan aimed at "purifying" the entire world. Between order and freedom, numbness and pain, how will an empty shell abandoned by the world decide the future of everyone with the first trace of emotion he has recovered?
