Lin Feng is the Soul-Reaping Officer with the worst performance record in the Underworld of Blue Star. Every day, he gets scolded by his superiors and mocked by his colleagues. After unexpectedly traveling to a parallel world's supernatural horror instance, he discovers that the monsters inside can be directly harvested and converted into performance points for the Underworld! From then on, he begins an unstoppable domination spree. In the D-rank Benevolent Heart Hospital, he subdues Bai Wei, a C-rank vengeful ghost and the hospital director. In the C-rank Scarlet Hotel, he tames Yingtao, a hotel attendant. He harvests supernatural beings all along the way, turning them into massive profits. His performance ranking rises from dead last to first place. He humiliates his arrogant colleague Zhao Wumian, while his astonishing achievements shock the higher-ups of the Underworld. While everyone else struggles to survive inside the instances, Lin Feng is busy boosting his performance, earning promotions and raises, and climbing to the very top!