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“Purity to me is not just about virginity. It’s about my mind, my body, my soul,” says 20-year-old Jordyn Wilson, readying her hair and makeup for the father-daughter purity ball she’ll attend later that night. The ensuing event—where young evangelical girls perform choreographed dances around a wooden cross and sign contracts promising their fathers they’ll abstain from sex until marriage—seems surreal and remote, until filmmaker Mirjam von Arx reminds us that 25 percent of Americans are evangelical Christians and that that number is on the rise. Von Arx’s camera crew follows the Wilson family around its posh Colorado Springs home and provides a glimpse into its spiritual life, from teen son Logan’s “manhood ceremony” (he gives a memorable speech about Oscar Wilde’s degeneracy and receives a saber as a present) to the “purity classes” Jordyn teaches to young girls out of her home. Von Arx’s film loses its focus when it tries to zoom out to the bigger picture (lots of vague Tea Party montages soundtracked by overly ominous music); its best moments are its most intimate, when it’s observing the captivating inner workings of the Wilsons’ home life.