With only the gear they can fit into one bag, three couples are dropped in three of the most difficult environments on earth and try to survive the wild, and each other, for three weeks as they make their way back to civilization.

Jenny and Justin struggle to find their first meal in a week; a raging forest fire forces Mitchell and Jhoanna to flee for their lives; and Max and Linn try to surpass their predecessors.

Mitchell and Johanna struggle through a 16-mile journey to a new camp, only to get caught in a hail storm; Max and Linn battle starvation and each other in the unrelenting jungle; Jenny and Justin's plan to travel higher into the mountains turns ugly.

In Morocco, Mitchell and Jhoanna endure a massive hailstorm before hunting for their biggest food victory yet. Elsewhere, Justin and Jenny finally emerge from a three-day storm in Norway; and in Mexico, Max and Linn experience a huge bounty—and a betrayal.

In Morocco, Mitchell & Jhoanna embark on a trek through higher elevations only to have tempers flare. In Norway, Justin and Jenny try to outrun an Arctic storm. And in Mexico, Max and Linn’s gamble to build a raft to float to civilization backfires.

In the final days of their challenge, survivalist couples struggle to reach civilization. Jhoanna and Mitchell go their separate ways. Justin and Jenny get flooded out of their final camp. And the medics must evaluate Max's declining health.