An adventurous couple convinces their friends to explore an unexplored cave system in the forests of northern Australia. When a storm hits, they decide to take shelter in the underground caves. Unexpectedly, floodwaters rush into the caves, oxygen levels gradually drop, and everyone is trapped in a completely unknown environment. What they didn't expect was that the humid air and rising water levels were only the least of the challenges of this journey. The floods also brought the most dangerous predators: a group of dangerous and hungry crocodiles. As the danger gradually heats up, the secrets hidden from each other by this group of friends are gradually revealed. They quarrel, fight, and betray each other just to survive this dangerous situation.