On the borders of Great Yin, the imperial court collects the "Eternal Light Tax" from thirteen border cities every year. The people believe those taken away are sent to work on the imperial mausoleum. In reality, they are buried underground to sustain an immortality formation that prolongs the lives of the imperial family. Xie Wugou, once the greatest war god who defended the empire's borders, discovered the truth, and his entire army was slaughtered. His tendons were severed, and he was hung at the city gate as a public spectacle. All he wanted was to die. But a young girl who earns her living collecting corpses for the dead secretly took him down. Her name was A-Man. She saved him with just one condition.