Private eye Johnny Merak's latest client, top Mob man Enrico Manzelli, has received death-threats. A menacing man himself, he pressures Johnny to discover who was sending them - and why. Then Barbara Minton, a rich heiress, disappears, and her husband turns to Johnny. Despite Manzelli's ultimatum - that Johnny should focus on his case alone - he takes the job. But that's before he discovers the fate of the first detective Minton hired. And more bodies are stacking up ...