Swarming wasps, deadly anacondas, poisonous toads and venomous stingrays surround the survivalists in sun-scorched Brazil. Just days into their challenge, a standoff with a poisonous Fer-de-lance snake threatens to send both survivalists home.

A freak injury puts super-fan survivalists Maci and Justin at risk as they attempt to survive the treacherous Nicaraguan jungle for 14 days.