An idyllic wildlife cruise disintegrates into terror when a party of tourists are stalked by a massive man-eating crocodile. Pete McKell, a cynical American travel writer, joins a disparate group of holiday-makers on a river cruise through the waters of Kakadu National Park. Initially Pete clashes with their tour captain, Kate, a feisty young woman who assumes he is just another 'city-slicker' in search of a quick thrill. After an uneventful day cruising the river, Kate is reluctantly persuaded to steer their boat into unexplored territory. They discover a secluded lake but terror strikes when their craft receives a powerful blow from beneath the murky depths and begins to sink. With little choice, she beaches the vessel on the closest dry land -a tiny mud island. With a rising tide and only half an hour of daylight left, fear grips the group as they realize they are trapped in the lair of a 'rogue' crocodile, governed only by its need to hunt and kill.