In order to reestablish the order of the rivers and lakes that had been lost due to the change of dynasties and many years of war and chaos, Qi Dongyang, the head of Dewu Sect, the great martial arts sect, established the "Sihai Hall" to recruit martial arts talents from all over the world to defend the right way. The young master of "Little Dongtian" is Tie Ruyi, the young master of the Dongting family is Yun Zaitian, and he hates marrying the young girl Yan Chixue. They all enter the Sihai Hall together for their own purposes, and help justice solve strange cases many times. However, as they get along with each other, they develop feelings for each other and forge new grudges...
Intention: Gratitude, resentment, love and hatred