World-renowned survivalist Bear Grylls ("Get Out Alive with Bear Grylls," "Man vs. Wild") meets actor Ben Stiller ("Secret Life of Walter Mitty") on the rugged mountains of the Isle of Skye in Northern Scotland to go on a once in a lifetime adventure. As they explore their surroundings Bear tests Ben's limits in an effort to see how he measures up to the unpredictable and unforgiving challenges of Mother Nature.