The Bar-Kays. Teenagers when Stax picked them up. Backing Otis Redding. Then December 10, 1967 -- the plane went down in Lake Monona, Wisconsin. Otis died. Four Bar-Kays died. Trumpeter Ben Cauley was the only survivor from the band. They rebuilt from the wreckage, and Soul Finger -- the song they'd cut before the crash -- became the sound of resurrection.