Prosecutor Jun Wu Jiu is sentenced to prison after he was framed for a crime he did not commit. Filled with hatred, he is determined to avenge his teacher and fiancee. In spite of his circumstances, he relies on his wisdom to solve many cases and uncovers an earth-shattering secret. Can the mayfly shake the tree? Can a prisoner exact justice?

A disgraced "kung fu fraud" teams up with rival masters to turn his hometown into a martial arts tourist trap, only to face a hidden truth as the scheme gains unexpected success.