Fireworks, fast foot and think work to entertain mystery fans. Sammy Abbott, special investigator for the District Attorney of Santa Monica, goes in for some plain and fancy wool-pulling-over-eyes to protect himself in the murder of a caddish blackmailer. Suspected by his co-worker, the lieutenant, he manufactures evidence, lines up a case against the police commissioner, and manages to keep himself in the clear. Merry-go-round all done by mirrors.