In San Francisco, when a bookie is murdered by a protection racket syndicate, his bookie friend Dan Gannin and police lieutenant Barney Runson investigate.In San Francisco, when a bookie is murdered by a protection racket syndicate, his bookie friend Dan Gannin and police lieutenant Barney Runson investigate.In San Francisco, when a bookie is murdered by a protection racket syndicate, his bookie friend Dan Gannin and police lieutenant Barney Runson investigate.