That one-man crime crusade, Doc Connor, hopping from Broadway to race tracks, nags, horse players and professional gamblers and sucker deals, manages to produce some fast and slow burns over the death of jockey Mallo. Caring for Katie Storm's Siamese cat, returning Lt. Marsh' heavy needlings, Connor proves murder, sticks his neck out to catch the killer. Quick on the lip and making with the argot, this in the speedball system.