In cop slang spoken, Zombie means an undercover cop, especially for the drug enforcement squads. Here a cop impersonates a drug dealer to nail a gang of drug ring hoodlums. But the gangsters discover him and force him to use a needle to inject strychnine to himself. The cop dies and his colleagues seek revenge. This story is rather solid, realistic, showing with great accuracy how street cops work, I mean the drug enforcement cops. Not for all audiences and destined to crime stories goes as I am.