叶常绿(黄德斌饰)为朝廷刽子手，需在秋分前赴京上任，却在路途上遇到一列流放边疆的队伍，其中一名脱逃孕妇阮素心(姚子羚饰)赫然是恩公吕大人的小妾。数月前，吕大人因冒死进谏而被斩，而执行斩首之责的正是常绿﹗常绿本已为此极之内疚，如今又见素心怀有吕大人的骨肉，腹大便便，因而誓要保护素心以赎其过。

因缘际遇下，常绿带著素心寄居在京城最出名的稳婆花蕊红(邵美琪饰)家里。蕊红察觉常绿为人冷酷，行径古怪，一度怀疑他欲谋财害命。正当蕊红感到危机重重之际，常绿先发制人迫令蕊红替自己保守关于素心的秘密，蕊红碍于眼前形势无奈答允。

某夜，常绿见蕊红迟迟未归，怕蕊红因此事受牵连，于是带著鬼头刀上山寻找。常绿找到蕊红之馀，还意外发现不知名孕妇被埋尸山上。该女子虽已气绝，惟蕊红判定胎儿仍有活命机会，遂以素心的秘密胁逼常绿劏肚救胎。常绿只好挥下鬼头刀，剖腹取子。

Executioner Yip Sheung-luk has shed blood too many times to count. To protect his savior’s pregnant daughter-in-law Yuen So-sam from danger, Sheung-luk sends So-sam to the capital, where she is to stay with renowned midwife Fa Yui-hung.

A series of strange murders soon take place, and Sheung-luk saves a little life with his blade. But this baby boy of unknown origin gets Sheung-luk and Yui-hung in trouble with the imperial court. Step by step, the unlikely duo overcome obstacles together, developing a close relationship. Meanwhile, young couple Chek Tsz-chau and Chuk Siu-moon, both who have lived in a whore house for most of their lives, suddenly arrive at Yui-hung’s home. Siu-moon begs Sheung-luk to accept Tsz-chau as his disciple, but reckless Tsz-chau wants nothing more than to use this opportunity to escape from his punishment. Sheung-luk’s life changes forever after the appearance of mysterious magician Szema Chau. The baby boy’s identity is uncovered, putting everyone one step closer to their own deaths.

เย่ฉาง (หวงเต๋อปิน) เพชฌฆาตผู้ได้ชื่อว่าเย็นชาและน่าเกรงกลัวที่สุดในแดนประหาร เขาทำหน้าที่สังหารนักโทษอย่างไร้ปราณี วันหนึ่งเขาได้ช่วยชีวิตทารกคนหนึ่ง โดยที่ไม่รู้มาก่อนว่าในภายภาคหน้าเด็กคนนี้จะนำภัยจากราชสำนักมาให้เขา และทำให้คนรักของเขาต้องกลายเป็นอาชญากรที่ทางการหมายหัว

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