少林武僧火新（元彪 饰）本是香港一名神勇干探，因数年轻妻子带着女儿离开了他，加上在查案时误杀了一名青年，他一时看不开来到了少林寺出家。现在，火新和一班师兄弟回到了香港进行巡回表演，恰巧这时，一系列意想不到的命案发生了。接二连三有人突然浑身发热，发疯似的自残，最后惨死，连火新的前上司和好战友李sir都这样莫名其妙死去。为了查清真相，帮李sir申冤，火新决定留下来查明真相。火新与老友黄保（梁家仁 饰）的一个租客（陈豪 饰）一同住在黄保的出租房内，火新发现这么租客是一个男妓，但他的通灵感觉告诉他这人以后会和自己经历一系列惊险场面，案情越发扑朔迷离。火新再次成为通天干探！

Yuen Biao is a former Hong Kong officer. He quit after an "accident" occured where he kills an innocent teenager. He felt guilty and decided to train with monks to feel better. After 5 years, he joins the force again after an encounter with the supernatural at a performance. He realizes that he has no other choice but to help out with his visions, which are very accurate. When Yuen Biao meets up with his former friend, who is Gigi's dad, he is offered to live in an apartment next to them. There he meets Moses Chan, the man who got kicked out of where Yuen Biao would be living. Little does Yuen Biao know is that Moses is actually an undercover officer who's spying on the triads. Yuen Biao gradually learns the truth about Moses and they become good friends. They tackle on many strange cases along with Yoyo Mung, who became a lawyer after being a head officer/investigator.