Well into filmmaker Macky Alston’s search to find the connection between families in the Carolinas who share his last name, he observes that he’s asked several interview subjects leading questions, trying to get them to corroborate what he thinks they think instead of listening to what they have to say. Insights such as this—which occurs when Alston, who’s white, asks an Alston who’s black how she feels about slavery—make this documentary a compelling record of discovery, not only of history but of the filmmaker’s motives. Alston’s movie, which makes a plea for understanding between people with different histories and different lives, was inspired by his uncovering of a family secret—his ancestors owned slaves—and his decision to reveal a personal secret to his family.