Shan, a mermaid, is sent to assassinate Xuan, a developer who threatens the ecosystem of her race, but ends up falling in love with him instead.

Xuan's estate project involving reclamation of the sea threatens the livelihood of the mermaids who rely on the sea to survive. Shan is dispatched to stop Xuan and this leads them into falling for each other. Out of his love for Shan, Xuan plans to stop the reclamation. Unfortunately, Shan and the other mermaids are hunted by a hidden organisation and Xuan has to save Shan before it's too late...—Hasri Hassan

Mermaid Shan is sent to kill Xuan in order to stop his project which threatens marine life and the entire mermaid race. This brings them into falling for each other which leads a hidden organisation into hunting them down. Eventually Xuan has to save Shan before it's too late...—Sophia Chan

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.