上士麥科受到富豪哈利的雇用，帶領探險隊潛入有死亡之林之稱的熱帶叢林，企圖尋找西班牙帝國留下的寶物：一只鑲有紅寶石的匕首。他們進入叢林後很快便找到寶藏，本以為可以輕鬆交差，卻發現傳說中滅絕的仰巴里民族竟在樹林深處虎視眈眈，腳下枯枝藤蔓都活了過來，放肆地對這群入侵者展開一場血腥屠殺

Five carpoolers travel in a motorhome to reach a common destination. Night falls, and to avoid a dead animal carcass, they crash into a tree. When they come to their senses, they find themselves in the middle of nowhere. The road they were traveling on has disappeared and there is only a dense, impenetrable forest and a wooden house in the middle of a clearing, which they discover is the home of a spine-chilling cult.