Scenes of revelation and reckoning weave together in “Sugarcane,” a documentary that probes Canada’s shameful history of separating Indigenous children from their families to live in residential boarding schools.

The film, which premiered in January at Sundance Film Festival and is now streaming on Hulu, Disney+ and National Geographic, delves into the stories of survivors of widespread abuse at the Catholic-run schools, where children were subject to rape and physical abuse. Some students disappeared — and some were even killed.