After his young son goes missing, Lei (Andy Lau) begins a 14-year quest to find him.
| Actor | Role |
|---|---|
 Andy LauLei Zekuan | Lei Zekuan |
 Jing BoranZeng Shuai | Zeng Shuai |
 Ni JingyangSu Qin | Su Qin |
| HHe TaoZhou Tianyi | Zhou Tianyi |
 Tony Leung Ka-faiPoliceman | Policeman |
 Sandra Ng Kwan-YuFemale Trafficker | Female Trafficker |
 Sun HaiyingZeng's Own Father | Zeng's Own Father |
 Xu DiZeng's Own Mother | Zeng's Own Mother |
 Liu YaseXiao Ju | Xiao Ju |
 Hu YaozhiTraffic Policeman | Traffic Policeman |
 Zhao WenhaoShi Anyi | Shi Anyi |