Kael Quinn, an eighteen-year-old from the Undercity, relies on his F-Class Trash Collection talent to protect his sister, who suffers from Crystallization disease. Secretly, he possesses the SSS-Class All-Devourer talent, allowing him to refine anything. With it, Kael crushes enemies, foils schemes, and tears apart the corrupt class system. When the wasteland bows before him, the scrap-collecting boy says, 'I'm just a scrap collector, don't kneel.'