Four adoptive brothers—Bobby, Angel, Jeremiah, and Jack Mercer—reunite in their hometown of Detroit after their mother, Evelyn Mercer, is murdered during a grocery store robbery. The investigation uncovers that Evelyn was an unintended victim of a gang-related shooting. Determined to seek justice, the brothers take matters into their own hands, confronting local criminals and corrupt authorities, while uncovering complex ties between the crime and the city's underworld. As they navigate the dangerous streets of Detroit, each brother’s unique personality and methods add to their unpredictable quest for vengeance and answers.

As they dig deeper, the brothers find themselves entangled in a web of deception and corruption. They face increasing threats from powerful adversaries willing to do anything to hide the truth. Amidst the chaos, tensions rise among the siblings, challenging their bond and forcing them to confront their past. Their pursuit of justice brings them to a climactic face-off, testing their resolve and unity. Each brother must grapple with their motivations and the moral complexities of their mission, highlighting themes of family loyalty and justice amidst the criminal landscape.