Hard-hearted and smart Mo Ching (Raymond Lam Fung) became a crippled when he was young. ,Fortunately Ching met Chu Kot Ching Ngo (Dominic Lam Ka Wah), the Head of the Sheriff Bureau, and learned from him his unparalleled skills of using concealed weapons. Chu has once helped the Sung Emperor recover an invaluable piece of article that the empire has long lost. To reward Chu, the Emperor re-opened the Sheriff Bureau. In addition to Ching, Chu has recruited Jui Ming (Sammul Chan Gin Fung) — a cunning swindler, Tit Sau (Kenneth Ma Kwok Ming) — an honest guy, and the cold-blooded Lang Huet (Ron Ng Cheuk Hei) and called them “The Four”.

The Sheriff Bureau has cracked many difficult cases under the leadership of Chu. After having gone through thick and thin with the others, Ching has become a lot less arrogant. He has fallen in love with Song Chi Yin (Kate Tsui Tsz Shan), an herbal doctor, but she is only using him to sow dissension amongst “The Four”. This furthermore deepens the hatred between him and Sau. The King of Qi Chiu Cheong (Tsang Wai Kuen) and the treacherous minister Choi King (Lau Kong) are plotting to revolt against the Sung Dynasty. Chu risks his life to ruin their plan, but by doing this, he is also driving the bond between him and “The Four” to the verge of disintegration…

为人冷酷、机智聪明的无情(林峯)自幼双腿残废，幸得神捕司诸葛正我(林嘉华)培育，学得一身暗器绝学。诸一次为皇上寻回大宋开国宝藏立功，神捕司御准重 开门户，连同跟随多年的无情，诸先后收纳了滑头神棍追命(陈键锋)、正直善良的铁手(马国明)以及孤僻敏锐的冷血(吴卓羲)入其门下，正式封为神捕司的四 大捕快。

神捕司在诸的带领下屡破奇案，无情与众人经历种种患难逐渐学懂放下高傲及与他人相处，甚至对医师桑芷妍(徐...(阅读全文)子珊)动了真情，但妍却借机 挑拨离间，分化神捕司中人，甚至加剧无情与铁手之间的仇恨，加上诸为捣破齐王赵昌(曾伟权)与奸臣蔡京(刘江)合谋造反的阴谋而以身犯险，令神捕司与四大 捕快同时陷于分崩离析的状态......