Frank Balenger is a New York Times reporter doing a Sunday magazine profile on urban explorers, better known as creepers. It's an illegal activity but a very popular one, in which adventure seekers invade crumbling old structures in search of thrills and perhaps a glimpse of the past. Frank joins a team of four as they prepare to enter the long-shuttered and mysterious Paragon Hotel. They surreptitiously enter as darkness envelops the city, planning to emerge before dawn none the worse for wear. At least that's the plan. Initially they encounter the expected assortment of crumbling furniture, magazines, and rats, but soon they realize they are not alone, and their counterparts are not friendly people. It turns out that Frank's group has a hidden agenda involving treasure, and their rivals are after the same loot. Throw in an even more unfriendly kidnapper and his captor, and you have a nightmare in the making.