With his latest feature, celebrated documentarian Errol Morris confronts one of the darkest chapters in recent American history: family separations. Based on NBC correspondent Jacob Soboroff’s book, Morris merges explosive interviews with high-ranking whistleblowing officials and artful narrative vignettes tracing one migrant family’s plight as they venture north toward the U.S. border. Together, they reveal that the cruelty at the heart of this policy was its very purpose. Against this backdrop—with hundreds of families still separated years later—audiences can begin to grasp the unthinkable effects of the U.S. government’s border policies, and the horrifying reality that this not-too-distant history is poised to repeat itself.