In the giant ringed city of Segness, human emotions are resources that can be quantified, harvested and traded. The upper class elite enjoy the luxury called "pleasure", while the people at the bottom are squeezed out of their last traces of joy and sorrow.
Kane, a top "emotional mediator", can use his hands to blend the most violent sadness into docile products. When his only relative, his sister Lina, was on the verge of death due to a rare "emotional exhaustion syndrome", this man who had always followed the rules silently was forced to embark on an illegal and desperate path.
In order to find the legendary miracle that can restart all emotions - the "first spark", he allied himself with the mysterious black marketeer, made enemies with the ruthless order hunters, and plunged into the forgotten dark abyss full of primitive emotional storms at the bottom of the city.
Here, every step may be fatal. What he faces is not only deadly enemies and dangerous environments, but also the ultimate torture of his soul: When the reality of emotion is enough to destroy you, do you still have the courage to embrace it?
