Graduation is imminent. Gao Mo (played by Yu Xintian), Hai Lan (played by Guo Yan), Yu Shuai (played by Xue Fei), Li Mingzhe (played by Lang Peng) and Jiang Xiaoxue (played by Fu Man), who share a common love for outdoor travel, went into the mountains under the call of Zhang Yu (played by Guo Xin) for their graduation trip. The guide Aji (played by Kaka) is familiar with the situation in the mountains, and the good friends are all well-equipped, but the initial happiness and ease are soon destroyed by unexpected events. Mingzhe and Hai Lan accidentally fell into the water and lost the only satellite phone that could contact the outside world. Aji urged everyone to hurry up as he believed that the ghosts of those who died in vain in the mountains would bring them unexpected troubles. The panicked young people finally came to a long-abandoned mansion courtyard. As night fell, the greedy Yu Shuai looked for valuables everywhere in the yard. After that, this reckless and awe-inspiring guy called on everyone to play pen fairy for excitement. A terrible event befell them...