新任福建按察使于成龙到任后，发现前任官员草菅人命，造成当地上万平民锒铛入狱。为开释无辜，昭雪错案，于成龙不顾自身安危，想尽种种办法，向驻节福建、权倾朝野的康亲王坦诚进言，与骄横偏执、心理阴暗的勒春、喀林等周旋斗法，拯妇孺老弱于水火，救受害无辜于囹圄，终以其正直执拗的人格魅力和清廉简朴的品行操守，战胜了重重困难，使一方百姓得以安居乐业。


Yu Chenglong, a newly posted Commissioner of Justice in Fujian, finds that his predecessor had treated people like dirt and cast thousands of people into prison. Regardless of his personal safety he goes all out to put in word for the imprisoned innocent people before powerful Prince Kang stationed in Fujian. He uncompromisingly struggles against the insidious Le Chun and Ka Lin to save the old and weak from jail. Eventually, Yu Chenglong, by virtue of his uprightness and persistence, brings obstacles to submission and gives peace to people.