Gemma Doyle and her friends have packed their bags and headed to London for her sister Pippas wedding. Waiting for her in the hotel lobby is none other than Gemmas ex-husband, Paul Erikson. Paul has a rare book he wants her to seecalling it the real dealso Gemma agrees to meet him at their old shop, Trafalgar Fine Books, the following day. But when Gemma arrives, accompanied by Grant, a rare book dealer, they find Paul dead in his office.