Law Abiding Citizen is a gripping thriller that tells the story of Clyde Cullen (Jamie Foxx), a mild-mannered man whose life turns upside down when his wife and daughter are brutally murdered. The police investigation fails to yield results, and Clyde becomes increasingly frustrated with the system. He takes matters into his own hands, seeking revenge against the perpetrator, who has been released due to a technicality.

As Clyde's quest for justice intensifies, he attracts the attention of a determined prosecutor, Nick Bannister (Gerard Butler), who is torn between his duty to uphold the law and his growing admiration for Clyde's determination.