Strange crimes occur in Thailand as the ranking for the world's best detective sees a shift. New detectives come into the picture to tackle three difficult cases.

A mysterious mutation strikes the Water Demon clan, prompting Yi Sa and Zong Hang to embark on a perilous underwater quest. As they uncover ancient secrets and awaken hidden powers, they find themselves in a visually stunning world of danger, love, and reincarnation.

Strange crimes occur in Thailand as the ranking for the world's best detective sees a shift. New detectives come into the picture to tackle three difficult cases.