When the Prince of China rebels, the people are in desperate need of help. The female general, Gu Cailan, sacrifices her life to protect the young prince and escape the siege. The only son of the richest man in the town, Liu Chunfeng, is handsome, good at kung fu and good at music, but he is a loose cannon and has nothing to do all day. He has heard that the Whirlwind Academy is in a state of decline and its discipline is lax, so he insists on attending the Academy in order to relax.
A playboy business tycoon, Liu Xuan, purchases the Green Gulf, a wildlife reserve, for a sea reclamation project, and uses sonar technology to get rid of the sea life in the area. Unknown to him, the Green Gulf is the home of merpeople, and the sonar has caused many of them to succumb to illness or die. Xuan's business ventures in the area are threatened when he crosses paths with the mermaid, Shan, who is sent to avenge her people.
