*Blood for Blood (2012)* follows Job, a methodical Dutch undercover cop whose life shatters when his wife is murdered. Consumed by grief and disillusioned with official justice, he goes rogue. Using his expert skills, he infiltrates Amsterdam's brutal drug underworld alone, not to enforce the law, but to hunt his wife's killers. As he descends, the line between cop and criminal vanishes in this tense thriller about the corrosive, transformative power of vengeance.