The influence of Belgian masters Jean-Pierre and Luc Dardenne's documentary eye for youth on the margins is evident in Ursula Meier's calmly heartbreaking drama. Soulful Kacey Mottet Klein (Gainsbourg: A Heroic Life) plays a 12-year-old boy who supports himself and his apathetic, defeated older sister (Léa Seydoux) by stealing ski equipment from rich folks up at a fancy Alpine ski resort, then making his way down the mountain to fence the stuff. The high-low setting effectively reinforces the emotional geography of both lost souls. Gillian Anderson makes a brief, well-placed appearance as one of the rich. A-

