Long-time friends Bacon (Jason Statham), Soap (Dexter Fletcher), Tom (Jason Flemyng), and Eddy (Nick Moran) put together 100,000 so that Eddy, a genius at cards, can buy in to one of Harry The Hatchet Lonsdale's (P. H. Moriarty) weekly high-stakes three card brag game. Harry learns that Eddy is a card savant from his bodyguard Barry "the Baptist" (Lenny McLean). Knowing that he cannot win he decides to fix the game. He does so by having Barry watch a feed from a camera hidden behind Eddy, and reveal Eddy's card values to Harry by a system involving a device hidden on Harry's leg. Eddy loses not only his 100,000 buy-in, but an additional 500,000 that Harry bullied him into borrowing to play out the biggest pot of the night. Harry demands repayment within a week. Knowing that Eddy and the others have slim chances of raising half a million pounds within a week, he pulls Eddy's father's bar into the deal as an alternative, in an attempt to get his own revenge on Eddy's father. Barry the Baptist tells Eddy that he will remove a finger from each of the four friends for every day the debt is overdue.
After several days with no luck acquiring the funds, Eddy returns home and overhears his neighbours, a gang of thieves led by a man named Dog, planning a heist on some marijuana growers supposedly loaded with cash and drugs. Eddy relays this information to the group, intending for them to rob the neighbours as they come back from their heist. They install taping equipment to record the conversations of their neighbours. Tom acquires a pair of antique shotguns from an underground dealer, known as Nick "the Greek" (Stephen Marcus), who also strikes a deal with Rory Breaker (Vas Blackwood), a gangster and sociopath, to buy the stolen drugs. Nick had purchased the guns from a pair of bungling small-time criminals, Gary and Dean (Victor McGuire and Jake Abraham), who had stolen them from a bankrupt lord as part of a job for Harry Lonsdale, not realizing that of the entire stolen firearms collection, his only desire was the two antique shotguns. After learning the guns had been sold, an enraged Barry threatens the two into getting them back.