Alison and Jenny McGregor -- Aberdeen's own mother-daughter singing sensation -- are through to the semi-finals of TV smash-hit Britain's Next Big Star. But their reality-TV dream turns into a real-life nightmare when a ransom demand appears in all the papers, on TV, and the internet, telling the nation to dig deep if they want to keep them alive. Time is running out -- and DS Logan McRae and his colleagues have nothing to go on.