The film “Preacher’s Sons” is the cinema verité story of five irrepressible but troubled boys – pulled from the train wreck of foster care – the two articulate men who are now their fathers, and their moving metamorphosis into a solid family unit. The Stewarts are an unconventional family with surprisingly conventional values. Their odyssey is intimate and moving; but it exists within a wider context of the national debate over same-sex marriage and adoption.