First-time documentary makers Heather Whinna and Vickie Hunter plunge into the Christian rock scene and come back with a wealth of sincere and engaging backstage interviews, shot at various Chicago clubs and at the Cornerstone Christian Music Festival in Bushnell, Illinois. The musicians talk about the tension between their faith and their profession, with its obvious lures of sex and drugs and the insidious temptation to glory in oneself. Even more interesting is the unacknowledged tension between the directors, both secular indie-rock scenesters, and the hard-core fundamentalists who denounce abortion and homosexuality. Whinna and Hunter soft-pedal the conflict by privileging indie-friendly (i.e., liberal) bands like Duvall, Pedro the Lion, and the Danielson Famile, though the arresting scenes of mass prayer are treated like martian landings. 95 min.