After nearly three weeks in the bush, two survivalists have tapped out and most others are making desperate treks across the savannah in search of food. If they can't find sustenance, they'll be forced out of the most difficult challenge of their lives.

With 15 days to go in the 40-day challenge, the ten remaining survivalists - dehydrated and protein starved - find themselves converging at dangerous Piranha Lake where they will they compete over scarce food and water.