To outsiders, we look like nothing more than ordinary college students. But we have another identity: we are practitioners of yin-yang arts. During the Jin Dynasty, the world underwent great upheaval, and practitioners spread across the land. Legend has it that demons possess powers they can use to control humans, while humans have wisdom and rely on innate astral energy to forge magical artifacts. People call them Demon Tamers. And in the seemingly tranquil twenty-first century, a conspiracy a thousand years in the making is quietly unfolding.