It’s the New York Department of Weights and Measures vs a systematic effort to defraud the public by providing less product than they pay for…organized by unscrupulous city alderman Marty Cavanaugh, who hospitalised the last top deputy inspector. The new man, pugnacious Johnny Cave, walks on the toes of important merchants, drawing increasing political and strong-arm pressure to back down. Will Irish luck (or pluck) get him through?