The staff at Prestige Pawnbrokers are blown away by two jaw-dropping diamond necklaces, owned by two very different clients. Single mum Marcella is looking for a better future for herself and her son and needs £20,000 to kick-start her music career, while wealthy mother-of-four Ingrid wants to raise capital for her new horse importation and training business. They both hope that family heirlooms that have been gathering dust can kick-start their new lives. But following a closer inspection of one of the necklaces, there's a sleepless night for staff member Patrick, who suspects one could be fake. And Prestige MD James Constantinou is excited by a very unusual yellow mini submarine, which policeman David wants to sell. James tests it in a 'James Bond-style' underwater joyride, as he attempts to impress a potential buyer.