In order to find out why his wife was killed, Chen Zheng, the general of Zhenhai, has been tracing a mermaid, but while doing so, he accidentally discovered a conspiracy in North Korea. With the help of the mermaid, he punishes rapists and eliminates evil, tearing apart the wicked conspiracies...

Zhou Kun is focused on cultivation while Li Jiao Ran is focused on getting rid of evil. They are childhood friends who have been quarrelling with each other since young but a mysterious murder case brings them together. Zhou Kun is moved by Li Jiao Ran as she risks her life to investigate the case. Both of them rush to Youming Town to discover the truth behind the murder case.