In a world haunted by unseen monsters born from human trauma, only a rare few known as Yin Users can wield a mysterious energy called Minus—a power drawn from their deepest pain and beliefs. When a devastating tragedy wipes out an entire village, a young survivor awakens to a curse that ties them to the prophecy of the Hollow Heir, a being said to erase existence itself. Now under the surveillance of the Yin Control Division, they must confront corrupted souls, and twisted cults.