Frank Vega, a Vietnam War veteran who has gained notoriety as a senior vigilante, runs a community boxing gym in Los Angeles. When his promising young student, Manny, is brutally murdered, Frank teams up with his old friend Bernie Pope to find those responsible. Bernie, an elderly man with a strong sense of justice, brings his own unique skills and frustrations to the table. Together, they navigate the dangerous underworld of gang crime and corruption in their quest for vengeance.

As Frank and Bernie dig deeper into the case, they uncover a broader criminal conspiracy that involves not just local gangs but also powerful figures from the city’s elite. The duo faces numerous violent confrontations and betrayals as they work through their list of suspects, escalating their mission from simple retribution to dismantling an entire network of crime. Along the way, they rely on their wits, strength, and unwavering determination to clean up their neighborhood and honor Manny's memory, while also confronting their own personal demons.