Four Brothers is a 2005 American action drama film^[3] directed by John Singleton. The film stars Mark Wahlberg, Tyrese Gibson, André Benjamin and Garrett Hedlund as four adopted brothers who set out to avenge the murder of their adoptive mother. The film was shot in Detroit, Michigan and the Greater Toronto Area.^[4] It has been described as blaxploitation-influenced.^[5][6] Released on August 12, 2005, the film received mixed reviews from critics and grossed $92 million worldwide.

An older woman, Evelyn Mercer, is murdered at a convenience store in Highland Park, Michigan when a robbery occurs that results in the death of the store clerk and her, the sole witness. The incident brings her four adopted sons back home to Detroit, Michigan to find out what happened. The oldest is a lifelong criminal, hot-tempered Bobby; the second oldest is family man and union construction worker Jeremiah; the third oldest is an ex-hustler and former US Marine, Angel; and the youngest is aspiring rock musician Jack.

During their investigation of the crime of what seems to be a simple robbery gone wrong, they discover that it was a cover for a hit put out on Evelyn after interrogating the witness who turned out to be involved.

The brothers track down the pair of hired guns who shot and killed Evelyn, and when they refuse to give up any information, they are executed by the enraged Bobby and Angel. The next day, the brothers’ friend turned Detroit Police Lieutenant Green and his partner Detective Fowler confront the brothers about the murders. While the brothers deny involvement, Lieutenant Green warns them that their interference with Evelyn’s case is ill-advised and that it would put them in over their heads.

Confronting Jeremiah upon the discovery of his business failing and benefiting from Evelyn’s life insurance, he informs his brothers that his construction company was failing precisely because he was not getting involved with gang lord Victor Sweet. For a project to succeed he had to pay off the right people, which he initially failed to do.

Trying to restore his business and relieve pressure on himself, Jeremiah pays off Sweet’s henchmen. As for the life insurance, he explains that the money went directly to him for his daughters, because he paid all of Evelyn’s bills while the others were not around. Sweet’s men attack the brothers; Jack is shot during the subsequent gunfight and dies shortly after. Bobby and Angel fend off and kill the gunmen.

Lieutenant Green informs them that Evelyn filed a police report regarding Victor Sweet and his involvement in Jeremiah’s affairs, which Fowler passed on to Sweet. He warns them to stay out of the matter and let him handle Fowler, and then promises to work together on Sweet. Green confronts Fowler about Evelyn as he’s realized he’s a crooked cop. After they walk out of the bar, knowing Green will arrest him, Fowler kills him and makes dispatch believe two black assailants had fired upon them.

The remaining brothers devise a plan to buy Victor Sweet off with the $400,000 from their mother’s life insurance. Arriving at Fowler’s, Angel subdues him. Jeremiah goes to meet Sweet while Angel’s girlfriend, Sofi, heads to the police station, where she tells them that Angel is planning to kill a police officer.