Lin Mo, who was originally a small policeman in the Gyeonggi Yamen, has a cheerful and funny personality, a talkative person, passionate and righteous, has strong powers of observation and resilience, and dreams of becoming "the best policeman in the world." After experiencing the baptism of supernatural events, he joined the Ghost Hunting Division. During the trials of the case, he experienced the eight hardships of life. He gradually lost his youthfulness and became mature, steady, wise and courageous. He eventually inherited the position of "Blue Dragon" and fell in love with Suzaku. Later, he accidentally discovered an official conspiracy and fell into a struggle that affected the entire Dayin Dynasty...
