The Locked Room(2019)

The Locked Room is a Chinese detective series following Mu Xia, a gifted locksmith drawn into a mysterious murder investigation. When police academy security consultant Mu Xia crosses paths with earnest detective Qin Zuo Man at a crime scene, the two form an unlikely partnership. Joined by charismatic cop Tan You, they become an investigative team specializing in impossible locked room cases. As each sealed space presents new puzzles, the trio must combine Mu Xia's technical expertise with their detective instincts to unlock secrets and expose hidden truths. The series blends procedural mystery with character dynamics as the team navigates increasingly complex cases that challenge both their skills and their growing bond.