A forgotten murder

Romance novelist Sara Medlar, her niece Kate and their friend Jack are visiting an old friend of hers in England. Upon arrival at Oxley Manor, a centuries-old estate that has been converted to a luxury hotel, Kate and Jack learn that Sara has also invited a number of others to join them at Oxley. Decades earlier, two people ran off together from Oxley and haven't been heard from since-- and Sara wants to solve the case. The guests-- people who were there the night the two went missing-- are cast in a live mystery-theater event. But everyone has something to hide. The discovery of a body makes it clear that at least one of the people who disappeared was murdered-- and someone is willing to continue to kill. -- adapted from jacket