Everything goes wrong from the start. The money's been stolen from the remote North Wales post office, but Darren's been over-enthusiastic with the lump hammer. The elderly sub-postmistress lies in a coma.
When Darren and Alastair get back to Liverpool only to have the money stolen from them- when a consignment of pure cocaine is added to the mix, along with some seriously dangerous criminals - things really get out of hand, and stay that way until the story finally crashes to its grisly conclusion.