Gui Xiang is super clever girl with low EQ. She investigates into a murder case in competition with a young police detective.
| Actor | Role |
|---|---|
 Wang LuodanGui Xiang | Gui Xiang |
 Vic ChouA Zhe - Yang Xinzhe | A Zhe - Yang Xinzhe |
 Simon YamDoctor Cai - Cai Chun'an | Doctor Cai - Cai Chun'an |
 Maggie Shiu Mei-KeiMrs. Cai - Lin Wenyu | Mrs. Cai - Lin Wenyu |
 Shek SauA Zhe's Father | A Zhe's Father |
 Nina Paw Hei-ChingAunt Wei Qing | Aunt Wei Qing |
 Tien HsinMaggie Wei Maji | Maggie Wei Maji |
 Na Wei-hsunCrimal Police - Hua Maonan | Crimal Police - Hua Maonan |
 Kerr HsuA Zhang | A Zhang |
 Sphinx TingQiang Qiang | Qiang Qiang |
 Li XingLin Hong-Bo's wife | Lin Hong-Bo's wife |
| RRao Wei-pengHospital Doctor | Hospital Doctor |
| SShi Hong-xingGuest | Guest |