On a stormy night, deliveryman Chen Jin receives an order from the site of a fire and picks up a Sui Ren Black Stone engraved with the history of humanity's despair. By the time he discovers that negative emotions can be turned into flames capable of scorching the heavens, he's already been branded a “serial arsonist.”
On the run, a paralyzed old man uses his last spark to show him the way; a suicidal girl sings “Happy Birthday” amid the ashes; and the policewoman hunting him has a lighter made from human bones at her waist.
Only when Chen Jin sets himself ablaze and charges into the heart of eternal night does he discover that all the dreams cut short, broken engagements, and souls drained dry by the 996 work schedule are nourishment for a higher civilization's selection of “cremators.”