In Prism City in 2242 AD, emotions have long become a commodity that can be bought and sold. People are addicted to the canned happiness called "qingsu" and forget the salty taste of tears and the real heartbeat.
Ling Xiu, who was once the city's top "emotional tuner", fell off the altar due to a fatal accident. Now he is hiding in the chaotic bottom city, running an antique shop that repairs old things, and makes a clean break with the past. He is like a lone wolf licking his wounds, building high walls with indifference and meanness, refusing to touch anyone's emotional world.
However, an invisible plague called "Silence" spreads quietly, depriving people of all emotions and turning living souls into cold empty shells. When Su Wan, an elite law enforcement officer from the upper-level "Tianqiong District", knocked on the door of Ling Xiu's shop with her brother who was on the verge of "silence", his dusty past was forcibly tied together with the city's doomsday future.
One is a genius imprisoned by the past, and the other is an elite who risks everything for his family. In this dazzling but cold cyber city, they must dive into the deepest depths of emotions and memories to fight against an invisible enemy. But they are about to discover that "Silence" is not a plague, but a well-planned conspiracy. And the only antidote to heal this city may be what they have abandoned long ago, the most real, painful and hot thing - the human heart.
