Polar opposites, Keith, a hard-headed Navy vet, and free-spirited yoga expert, Willow, must endure Panama's boa-ridden swamps and an army of biting insects.
Blake, a Biology professor, and Caesar, a Shaman, must traverse the Chugash Mountains to reach civilisation. All while tied together by a six-foot tether.
Henry, an experienced outdoors man and biologist, and Laura, an Air Force veteran with a tough-girl exterior, are locked together by a four-foot tether.
Nick, a gold miner from Alaska and Jameson, a therapist from Haiti must navigate through rugged terrain all while locked together by a four-foot tether.