Ancient city ruins were discovered in an uninhabited area under the jurisdiction of a county in Urumqi, which are suspected to be ruins of the ancient Western Regions. The Cultural Relics Bureau dispatched a ten-member archaeological team to conduct research and inspections. After the team entered the vicinity of the ancient city, work reports were sent to the headquarters every day. However, they lost contact after entering the ancient city on May 17, two weeks after being stationed outside the ancient city. After two years of investigation by the local police to no avail, the case was classified as a disappearance. The Ministry of Public Security set up a 517 missing case task force to investigate locally. I found a local Uighur girl as a guide, and this Uighur girl seemed to know this ancient city very well. On the way to the ancient city in the desert, I met an expedition team of two men and one woman. They were unable to move forward because their car broke down. Later, he went to the ancient city with the task force. During the investigation in the ancient city, the whereabouts and actions of these three people aroused suspicion...