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Rookie policeman Pete Harris (Darren McGavin) goes undercover to infiltrate a gambling ring in Brooklyn, N.Y. He encounters problems, however, since many of the officers are on the take and accepting bribes from gamblers to keep quiet. Adding to Harris' problems, he falls for Lil Polombo (Margaret Hayes), the widow of a crook, despite being married to Jane (Peggy McCay). As the investigation intensifies, both Pete's marriage and his life become threatened. Wikipedia