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Eight people are in trouble, six mysteries, who are the survivors? The sister she had lived with for many years ran away from home, and the only clue left to her sister Shen Yixin was a train ticket. In order to find the whereabouts of his sister, Shen Yixin embarked on a journey with the members of the "Wildness Hotel". Unexpectedly, a car accident occurred on the way, and everyone fell off the cliff and strayed into a strange tribe at the bottom of the valley. This is a primitive tribe that can be called a miracle of modern society. Its lifestyle is backward, there is no written language, and its language has its own system. However, when the two parties were unable to communicate normally, murderous crimes occurred one after another among the modern victims and primitive tribes...