Detective Ji Bai and new criminal profiler Xu Xu may seem like an awkward teacher-student pair at first glance, yet they are actually the best partners in the police force, solving one crime after another. Ji Bai slowly falls in love with Xu Xu, yet she is a girl who is as slow as a snail when it comes to love. Just as Xu Xu starts to reciprocate Ji Bai's feelings, the dormant "Angel's Killer" reappears.

Shirley Yang’s unintended pregnancy brought more pressing pressure to bear on Hu Ba Yi who was trapped in a bloody curse. At the archaeological invitation of Professor Sun, he learned that in the Feng’s historical site opened once per 12 years in Dixian village, there might be corpse pellet that could eliminate the curse. With the help of the mechanism dab Yaomei, the trio of legendary grave robbers entered the mountain again to fight for survival.