故事发生在近未来，因为未知神秘生物的出现，导致整个城市面临前所未有的危机。一桩被隐藏多年的秘密计划浮出水面。少年马山（王俊凯 饰）被带入749局，进入层层迷宫，开启一程冒险之旅，并在这一旅程中完成了一次自我的成长与救赎。
Beneath the fake blood and cheap masks of countless haunted house attractions across the country, there are whispers of truly terrifying alternatives. Looking to find an authentic, blood-curdling good fright for Halloween, five friends set off on a road trip in an RV to track down these underground Haunts. Just when their search seems to reach a dead end, strange and disturbing things start happening and it becomes clear that the Haunt has come to them...
从事租赁业的昌贤和儿子秉哲一起生活。有一天突然接到一个电话，内容是在美国的亲家少女英美暂时来韩国旅行，暂时住在昌贤家。 几天后，昌贤去机场接亲家姑娘，但还是错过了。秉哲好久没叫女朋友美静在客厅做爱了。 要登上顶峰的瞬间玄关门开了亲家姑娘进来了..
