After a car accident, Xiaoyu got involved in a life-and-death adventure in a different world called "the Abyss." The terrifying underground tomb, the primitive jungle where danger lurks at each corner, the dilapidated world of the future... Not only do these dangerous worlds want to devour the participants' lives, but the teammates around him may also show their fangs at any time! In order to survive, Xiaoyu can only move forward and climb up step by step. Until he breaks through everything and looks around, finding that the world has surrendered underfoot...