Set in a fictional city, a story about solving crime through forensic science leads to a serial murder case from 20 years ago. While assisting the police in their investigation and trying to reverse the case involving her father, female forensic doctor Song An Yan joins hands with hot-blooded detective Liu Zhi Ming in their desperate search for the truth. Along the way, they cross paths with the mysterious Lin Xiao Mei.

• Charlene Choi Cheuk-Yin
• Joseph Chang
• Gillian Chung
• Kenny Kwan Chi-Bun
• Carlos Chan
• Henry Prince Mak
• Jeana Ho Pui-Yu
• Law Kar-Ying