William (Red West) is a suicidal geezer who's like a hostile old cowboy. The moment he starts to snap at Solo (Souléymane Sy Savané), a Senegalese-born taxi driver in Winston-Salem, N.C., the kind, striving, smiley-faced Solo decides to be his buddy and protector. A cynic might peg their young/old, black/white, happy/crotchety chemistry as a convention. But Goodbye Solo director, Ramin Bahrani (Chop Shop), slowly weaves the two men's lives together by stitching in little pockets of mystery, and the result is a playful, elusive movie that isn't so much heartwarming as soul-cleansing. B+

