In New York City, a botched drug operation results in the deaths of four police officers, causing a ripple of shock and outrage through the NYPD. The incident triggers an internal investigation led by Ray Tierney, a detective who comes from a long line of police officers. The family's legacy in law enforcement looms over Ray, complicating his sense of duty as he delves into the case. The investigation is particularly delicate for Ray since his brother, Francis Jr., commands the precinct where the tragedy occurred, and his brother-in-law, Jimmy Egan, is also part of the team implicated in the murky circumstances surrounding the shootout.

As Ray's investigation progresses, he uncovers uncomfortable truths about corruption and moral decay within the force and close to home. The more he learns, the more conflicted he becomes about his loyalty to his badge and his loyalty to his family. The intertwined personal and professional stakes put Ray at odds with those he loves and respects, forcing him to navigate a treacherous path that challenges his principles and threatens to dismantle the family's honored, but now potentially tarnished, legacy. The case pushes Ray to confront difficult questions about justice, brotherhood, and the fine line between right and wrong within the law's shadowy gray areas.