Driven by amateur whisky-nut Adam, four late-thirties ex-university mates are heading to Islay - the remote Scottish island world famous for its single malts - with a wallet full of cash, a stash of coke and a serious thirst. Over a weekend soaked in the finest cask strength spirit, they meet young divorcee Molly, who Adam has a soft spot for, her little sister Ash who has all sorts of problems and Molly's ex-husband Joe, a control freak who also happens to be the local police. As events spiral out of control, they are all thrown into a nightmare that gets worse at every turn.