A South London gangster emerges from three years in prison and becomes a bodyguard for a famous actress, only to be sucked back into the shady underworld by a ruthless crime lord in this gritty crime drama starring Colin Farrell. Mitchel (Farrell) served his time in Pentonville Prison. Now that he's a free man, he's determined to keep it that way. His resolve not to fall back on his criminal past is weakened, however, when his longtime friend Billy (Ben Chaplin) offers him a place to stay in exchange for help with a quick and dirty job. But just as it seems like the past won't let Mitchel go, a promising new opportunity arises; high-profile actress Charlotte (Keira Knightley) is hiding out from the paparazzi in a Holland Park mansion, and she needs a man who can help keep them at bay. Little does Charlotte realize that Billy has set his sights on her classic cars and valuable art collection, and that Mitchel is the only thing preventing him from robbing her blind. But just as Mitchel and Charlotte fall in love and make plans to move to Los Angeles, notorious mob heavy Gant (Ray Winstone) presents the cunning ex-con with an offer he can't refuse: Gant wants Mitchel in his gang, and he won't take no for an answer. Before Mitchel can flee, Gant has got him under his thumb, revealing that Mitchel will die before he ever has a chance to take flight. Upon realizing that any refusal to follow Gant's orders will endanger not only himself, but his sister Briony (Anna Friel) and Charlotte as well, Mitchel prepares to strike back with a vengeance. Consequences be damned, Mitchel will do whatever it takes to protect the ones he loves, and prove that no man owns him.