In 1970, Anna Sorenson faces a critical decision that takes her back to a remote Canadian mining town named Flin Flon and her last year of high school. In 1955, she struggles to deal with her tyrannical mother and dysfunctional family even as the town also heads into crisis: a conflict between the mine and the union turns ugly, the hockey team battles for the championship and bitter cold weather takes an unexpected toll. "Slag" paints a gritty portrait of life in the North and offers a glimpse into the Fifties generation when rock and roll arrived and the strict social fabric began to unravel.