After their adoptive mother is murdered during a grocery store hold up, the Mercer brothers; hot-headed Bobby (Mark Wahlberg), hard-edged Angel (Tyrese Gibson), family man and businessman Jeremiah (Andre Benjamin), and hard rocking Jack (Garrett Hedlund) - reunite to take the matter of her death into their own hands. As they track down the killer, they quickly realise that their old ways of doing business have new consequences.