Six Thousand Meters of Secret Room

A series of secret room murders in Snowy Villa. The villa is located near the Everest base camp at an altitude of 6,000 meters. Every winter, the mountain is blocked by heavy snow and becomes a natural island. The murderer must complete "impossible crimes" on both the physical and psychological levels - all murders occur in locked confined spaces, but the murderer's real purpose is not murder, but to force an amnesia survivor to recover his memory through a carefully designed "death script" and reveal a tragedy that was covered up fifteen years ago.