A Chinese movie in 2020.
China's Ding Yin peace police team is activated while on a peacekeeping mission in a certain country. Ding Yin guides his companions Li Dashi, Rena, and Trafal Lijiao into the forest and in particular, but falls into a "mound with" which is difficult to escape. Some people with different lists and circumstances face the test of life and death and human choices. Will Ding Yin escape the puzzle?