Sean Baker's singular little ultra-indie is a strikingly unsentimental study in female friendship between unmoored souls in L.A.'s bleached, glamour-challenged San Fernando Valley. The relationship between twentysomething Jane (Dree Hemingway, the fresh-faced daughter of Mariel), relatively new in town, and eightysomething SoCal oldtimer Sadie (Besedka Johnson, an amazing nonpro discovery) unfolds with a matter-of-fact integrity that accepts all personal quirks, weaknesses, and sorrows as human and worthy of love. A–