Two brothers, Yat and Leung, with different mothers have different fates. After Leung and his mother being expelled from the family, they are housed by a feng shui master. Leung is a lucky guy and brings a good fortune to his mother. On the other side, Yat's presence poses a tragic threat to his family. Eventually, Yat's parents die and Leung's mother decides to raise Yat and the two boys exchange their names. However, their lives will turn upside down when they reach the age of thirty. The only way Yat can retain his luck is to overtake all the good luck from Leung.
| Actor | Role |
|---|---|
 Nick Cheung Ka-FaiLo Sei Leung | Lo Sei Leung |
 Alex ToSzeto Tin Yat | Szeto Tin Yat |
 Kristy Yang GongruFa | Fa |
 Sam LeeDark Hole Angel | Dark Hole Angel |
 Joe JuniorMaster Ko | Master Ko |
 Alfred Cheung Kin-TingUncle Chan Three | Uncle Chan Three |
 Jimmy Wong Wah-WoLi Tai-shin | Li Tai-shin |
 Amanda Lee Wai-ManMrs. Lo | Mrs. Lo |
 Ruco Chan Chin-PangKen | Ken |
| TTricia ChanYali | Yali |
 Thomas Lam Cho-FaiNot listed | Not listed |
 Claire Yiu Ka-LeiNot listed | Not listed |
 Anson Leung Chun-YatDebt Collector | Debt Collector |
 Rico KwokDebt Collector | Debt Collector |
 Michael Chow Man-KinMovie director [cameo] | Movie director [cameo] |