Plot: The team of Chinese peacekeeping police Ding Yin was raided while performing a peacekeeping mission in a certain country. Ding Yin led his companions Li Dashi, Rena, Trafal, and Lijiao into the dense forest, but fell into the "elephant mound" that is difficult to escape. Several people of different identities and backgrounds face the test of life and death and human choices. Will Ding Yin break out of the puzzle?