The Dajing Dynasty, on the surface, was prosperous and peaceful, but in fact, there were undercurrents in the court, the rivers and lakes were intertwined, there were constant intrusions on the border, and each unsolved case involved a conspiracy to subvert the court. Five boys and girls with completely different backgrounds, personalities, and skills met because of an unexpected murder. From mutual suspicion to sharing life and death, they traveled across the rivers, lakes and courts to solve mysteries, quell civil strife, and protect their country, composing a passionate group portrait legend.