“Chiefs” follows Wyoming Native-American high-school basketball players as they battle on the court---and to get off the “rez.” Or to stay there on their own terms. The Wind River Reservation's “Chiefs” have a history of excellence (five state titles in 18 years), and they make it to the state finals in both 2000 and 2001. But basketball's the easy part. “We all talk about leaving and going somewhere,” says player Beaver C'Bearing. “But nothing ever happens.” He might be wrong, but as he comes to realize, that will take hard work.