A weekend camping trip among six old friends in Northern Minnesota's "Boundary Waters" turns tragic after one dies under mysterious circumstances, triggering further turmoil as they attempt to unmask the killer within their own group. 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。