A team of four detectives with distinct personalities specializes in solving cold cases. Led by Luo Yingwei, the team includes gossip queen Cai Wenxin, determined Xia Luoyang, and quiet Feng Yi. Despite their differences, they work together to tackle complex cases and, with help from allies, face off against a powerful drug syndicate.

• Li Yuan
• Shi Shi
• Wang Yu
• Chen Muyang
• Pu Tao
• Cheng Yu
• Yang Xinming
• Li Chengru