Robert and Sophie arrive at Rosslyn Chapel, south of Edinburgh, Scotland. They have come here according to the last riddle in the keystone. "The Holy Grail 'neath ancient Roslin waits," it said. Even though Langdon feels it was too obvious a location, he figures they must be there for a reason, if Sauniere guided them there. Once inside the chapel Sophie had the strange feeling that she has been there before. She spots an archway that is covered with symbols carved in each stone. Lore says that the cipher was enormous and virtually impossible to solve. She remembers having been there as a little girl, shortly after her family had been killed. She remembers seeing her grandfather come out of a nearby house. She leaves the chapel and heads for the.....