Chen Beixuan is recognized as an "unlucky person" in Qingshi Village. He is ostracized by the whole village because of his natural evil and domineering body. In retaliation, the village bully Fang Han publicly humiliated and injured his mother Lin Xiulian, and drove the mother and son out of the village. When Chen Beixuan was about to die, he kowtowed to the century-old locust tree and asked for help. He awakened the locust lady who had been sealed for three hundred years, obtained the Yin locust mark, the "Breathing Condensation Art" and the Yin Ghost Finger, and embarked on the road of revenge and redemption.