As a child of Holocaust survivors, Howard Reich grew up immersed in the psychological wreckage of Nazi atrocities. His parents, like many in their position, were tight-lipped about what they’d seen and endured, but when Reich’s mother, Sonia, began sliding into dementia in her 70s, her fearful delusions became a Rosetta Stone that Reich used to decode her nightmarish experiences as an adolescent. Dry-eyed but deeply moving, this Kartemquin Films documentary by Gordon Quinn follows Reich (now jazz critic for the Chicago Tribune) on a journey of discovery back to the family’s native village of Dubno, Poland. It’s riveting stuff, though the cool jazz score by Jim Trompeter seems like an odd fit for the subject matter.