Daniel Lugo (Mark Wahlberg) is a regular bodybuilder who works at the Sun Gym along with his friend Adrian Doorbal (Anthony Mackie). Sick of living the poor life Lugo concocts a plan to kidnap Victor Kershaw (Tony Shalhoub), a regular at the gym and a rich spoiled business man, and extort him by means of torture. With the help of recently released criminal Paul Doyle (Dwayne Johnson), the 'Sun Gym Gang' successfully gets Kershaw to sign over all his finances, but when Kershaw survives an attempted murder from the gang, he hires Detective Ed Du Bois (Ed Harris) to catch the criminals after the Miami Police Department fails to do so.