In her first feature-length documentary, director Mina Shum (Double Happiness) takes a penetrating look at the Sir George Williams University riot of February 1969, when a protest against institutional racism snowballed into a 14-day student occupation at the Montreal university.

It started quietly when six Caribbean students, strangers in a cold new land, began to suspect their professor of racism. It ended in the most explosive student uprising Canada had even known. Over four decades later, Ninth Floor reopens the file on the infamous Sir George Williams Riot: a watershed moment in Canadian race relations and one of the most contested episodes in the nation’s history. Director Mina Shum (Double Happiness) locates the protagonists in clandestine locations throughout Trinidad and Montreal — the wintry city where it all went down. In a cinematic gesture of reckoning and redemption, she listens as they set the record straight.