While returning from a military expedition a helicopter crash lands a co妹妹ando unit in a dense, remote tropical jungle – a lost world populated by dinosaurs. Now they must find a way out of this isolated valley before becoming prey for prehistoric predators. 放弃一贯的私人化叙事模式，但这种带有疏离感的冷静叙事方式恰好符合影片所需要的独特气质，只是稍微破坏了一点影片的商业性，使得影片节奏过于散乱。