On a beautiful autumn morning, the children playing found a dying homeless youth at the entrance of the village. The noisy voices of the children attracted a kind and beautiful woman (played by Liu Xiaowei), who promptly gave the homeless youth water and food, and the beautiful shadow of the woman was left in the eyes of the homeless youth who slowly recovered his spirit. The handsome homeless youth (played by Li Zheng) was a mute. He got the help of a kind old man and stayed on this beautiful and intoxicating mountain. One day, he accidentally entered a huge and mysterious cave and accidentally learned a shocking secret that had been sealed for thousands of years. After that, the mute gradually integrated into this paradise in his poor and quiet life, and developed a vague relationship with the beautiful woman who had rescued him in mutual help. One day, the woman told the mute that there were rumors of ghosts in the village, and the old people in the village had begun to paste talismans to drive away ghosts. The mute was skeptical, but soon after a quiet morning, the mute witnessed a big monster with fire falling from the sky by the lake. Although shocked, the kind mute still rescued the man who fell into the water, but he became a disaster in the village. The pilot who fell into the water (played by Zeng Ang) discovered the secret of the cave and coveted the treasures in the cave. This greedy outsider turned away, and when he came back, he brought a group of invaders with him. The mute became the only survivor of the invaders' atrocities. In order to take revenge and protect the secret of the giant cave, he silently led a team of treasure-hunting invaders into the terrifying, strange and bottomless giant cave. As a result, even more incredible things happened one after another...