By scanning the locations at the bottom of the ocean where sunken ships, treasures and even cities lie, the show tries to answer what they look like, how they got there and if they hide any secrets.
在明尼苏达州北部的“边界水域”中，六个老朋友之间的周末露营之旅在神秘的环境下死亡后变得悲惨起来，随着他们企图在本集团内揭露杀手，引发进一步的动荡。
