Mentally-challenged Fai (Eric Kot Manfai) lives a simple life with his mother, but he is eventually abandoned by her when she leaves him to get remarried. Living with a family friend, Fai bumps his head in a serious accident, and the subsquent surgery turns him into a genius. However, Fai's gain in intelligence also means the loss of the innocence he once had.
| Actor | Role |
|---|---|
 Eric Kot Man-FaiNot listed | Not listed |
 Athena Chu YanNot listed | Not listed |
 Ada Choi Siu-FanNot listed | Not listed |
 Law Kar-YingNot listed | Not listed |
 Andy Hui Chi-OnNot listed | Not listed |
 Almen Wong Pui-HaNot listed | Not listed |
 Tats Lau Yee-TatNot listed | Not listed |
 Joe JuniorNot listed | Not listed |
 Raymond ChowNot listed | Not listed |
 May Law Koon-LanNot listed | Not listed |