Set in the riotous 1960s, this documentary explores the intricacies of Up With People, a clean-cut singing youth group who believed they could change the world. They were a cultural phenomenon spanning 40 years, reaching 20 million people, singing in 47 languages to 3,600 worldwide communities, performing for popes and kings, as well as four Super Bowl half-time shows. Smile 'Til It Hurts weaves together members’ heartfelt perspectives and private secrets with 40 years of Up With People’s vast archive of footage, photos and news clips into a smile-drenched, entertaining and thought-provoking romp through the underside of politics, cults and money.