Based on a true story, a young Black FBI agent (Yahya Abdul-Mateen II) is sent into 1960s Mississippi to investigate a wave of brutal killings targeting civil rights leaders. Forced to work alongside notorious mafia hitman Greg Scarpa (Mark Wahlberg), he finds himself pulled into a deadly hunt where justice and vengeance begin to blur. When the system is broken, two men divided by everything agree on one thing: the law has limits. They don�t.