Documentary trailer: Many know Bhutan as the last Himalayan Buddhist Kingdom and the only country in the world to use Gross National Happiness as its primary yardstick for progress.

Drawn by the allure of this enigmatic kingdom, four veteran athletes attempt an unprecedented human-powered, border-to-border crossing of Bhutan, hoping to experience Bhutan's policy of ?GNH? first hand.

When the demands of the grueling 32-day, 485-mile journey push the team beyond their breaking point, they must confront the challenge inherent in walking what Buddhist's call the Middle Path - embracing the benefits of our fast-paced modern life while still honoring the ancient traditions and values that make Bhutan so unique.