One year after a tragic accident, six girlfriends meet in a remote part of the Appalachians for their annual caving trip. 六个女孩相约进行一个探险旅行，她们选择了洞穴探险，这项活动与她们的年龄与体型相去甚远。
Mandy of today's travelers are looking for an unusual experience and adventure travel is becoming more and more popular. 当今许多旅行者想获得一种非同寻常的体验，探险旅行现在起来越受欢迎。
