Super-sleuth Zhao Yunlan (Bai Yu) meets unsuspecting university professor Shen Wei (Zhu Yi Long) and the two men are drawn together. They strike up a close, if somewhat unconventional friendship. But they soon find themselves at the heart of a high-stakes supernatural battle involving mysterious evil foes. At the heart of the intrigue is the mysterious and powerful Black Robe, who bears no small resemblance to Shen Wei. Will the heroic duo’s unique talents – and special bond – help them outwit the forces of darkness?