26岁的约翰·琼斯是一名洞穴探险家,他喜欢挑战各种不同大小的洞穴攀爬。2009年,琼斯挑战犹他州坚果石灰洞时,不幸陷入一个宽18英寸,深150英尺的洞中,因为洞穴其中一段的空间实在太过狭小,导致他整个人被卡死。救援人员竭尽全力营救,但是琼斯的身体正在一步步地突破极限……。Jake Foley is a computer technician for the NSA who secretly longs for a chance to work on the field. Circumstance puts him in a top secret laboratory, in the middle of a shootout between security guards and a saboteur. During the battle, a vial containing an experimental serum explodes, covering Jake with shrapnel. But it turns out that the serum is actually nanomites, microsc...。