After inadvertently witnessing the murder of an accountant, parole officer Simon Garden (Steve Coogan) is framed by corrupt policeman D.I. Burton (Stephen Dillane) -- and the only evidence that proves Garden's innocence is a videotape locked inside a bank vault. With the help of his ex-criminal buddies and love interest Emma (Lena Headey), Garden plots a break-in to steal the tape and clear his name.