一群生态学者,前往某沼泽地区采集水质样品化验以便作成环境评估报告。然而在这期间友人先后离奇失踪,终于得知是巨大鳄鱼所为,于是怀疑跟当地有人倾倒放射性废物有关。居住沼泽达三十年的乔闻后,而展开一场人鳄斗智斗力之争,鳄终于被消灭。A group of environmentalists arrives at a faraway tropical delta where toxic waste is being dumped. However the water also hides a giant crocodile. The corrupt local officials don't help much either.