To his girlfriend Ji Xiaowan (Hu Rongrong) birthday, Ran Ping (Leon) about the best friend Su-hyun (Wang Xiang), Hu Meirui (Tong Li Ya) and Yang Xue (Jia Liu) together to explore, but unfortunately in the cave suffered landslides. Ran Ping (William Li) girlfriend Jixiao Wan (Liu Jia) in the cave slip, Ran Ping (William Li) try to save, Xiaowan (Hu Rongrong) or fall into a bottomless black hole. Over time,... see more