一个盂兰节晚上，干探马如飞（方中信 饰）无意中翻阅一件发生在廿多年前戏棚大火案件的档案，决追查真相。过程中邂逅美丽的秦小虹（郭蔼明 饰），其冷傲性格令飞决心追求她。虹的养父秦宝剑（刘江 饰）乃术数名家，指虹三十岁前不可有姻缘，否则有性命之危。虹笃信不移，因而拒绝飞之爱意，但终经不起飞方真挚感情，展开一段浪漫情缘。惜剑所言一一灵验，发生连串意外。一次交通意外，虹脑部受震荡，前世片段不断涌现……　　原来飞与虹本是京剧团师兄妹，二人相爱惹来师兄陆剑棠嫉妒，纵火把二人烧死。而当年的师兄竟是今天的养父！剑排算术数寻得投胎转世的虹，将其收养，亦知飞与虹会重遇，因此以命理之说制造多番意外企图阻止二人重续未了缘。　　虹决离开剑，但情痴的剑决以术数命理改变命运，再次以火分隔飞与虹之再世情……　　真挚恋情感人肺腑，令人潸然泪下。

One Bon Lan Festival night, Detective Ma Rufei (played by Fang Zhongxin) accidentally looked through the files of a theater fire that happened more than 20 years ago and decided to find out the truth. In the process, he meets the beautiful Qin Xiaohong (played by Guo Aiming), whose cold and arrogant character makes Fei determined to pursue her. Hong's adoptive father, Qin Baojian (played by Liu Jiang), is a master of numerology. He told Hong not to get married before he was thirty years old, otherwise his life would be in danger.