Synopsis：In a deserted factory on the outskirts of a certain city, several people go missing every year, and the cause is never found. Thus, rumors spread that a monster called "Huangxiao" lives there. The older generation says that Huangxiao is a kind of mountain ghost—the spirits of people who got lost and starved to death in the mountains. They make anyone walking in the mountains lose their way, only to die of starvation... So, Lü Yuanhang, Qi Yulou, Yan Xinyu, and three others head to the abandoned factory with an adventurous mindset, hoping to find Huangxiao and experience the thrill. Perhaps they don't really believe in these so-called scary rumors. However, once they actually arrive at the factory, a shadow of terror immediately falls over them. One by one, their teammates die, and the group of six gradually dwindles to only Lü Yuanhang. In panic and fear, they search for a way to escape. Could their deaths really be connected to Huangxiao?