Yan Zi Ying is a passionate part-time hunter who values justice and works tirelessly to maintain equilibrium between the human race and devils. When the hunter headquarters notifies her grandfather that the seal is about to be ruptured, Zi Ying and her chubby parrot companion Xiu Shou set off on a mission to retrieve the sacred book from the vampire Yu Wen Hao's abode and reseal the seal by force. But little did they expect Yu Wen Hao to eagerly surrender the sacred book to them.