Alex is accompanying his sister Bea and her best friend Amy for their first time abroad--young Americans who have come to exotic Brazil for fun, adventure and the promise of foreign pleasures. On a rickety bus rocketing up a twisting mountain road, they meet the beautiful Pru, who is in Brazil for the sole purpose of experiencing the beautiful Brazilian women they've heard so much about. After enduring a bus crash which strands them in the middle of nowhere, Alex, Bea, and their band of traveling companions attempt to salvage their day by seeking out a cabana bar on a nearby beach rather than wait an endless amount of time for the next bus to come by. The discovery of the beautiful and secluded beach gives way to a day in the sun and surf, an afternoon at the bar, and a night of exotic liquors and hot dancing with the locals. It's everything their vacation is supposed to be, until they wake up face down in the sand the following morning, drugged and robbed, their possessions gone, and the trace of real danger in the air. The farther the group travels into this mysterious and isolated Brazilian community, the further they are from the possibility of escape--and the closer they come to the dark secret that waits for them in the underground caverns of the Brazilian jungle, and they must fight a primal battle for their lives in the most terrifying of all human traps.