Firefly Beach is Meira Pentermann's second novel. Her first novel, Nine-Tenths, was released in September 2011.
Following a divorce from her husband, and her mother's recent death, Beth LaMonte is looking forward to a fresh start when she moves from Albuquerque, New Mexico to a small coastal town in Maine named Virginia Point. Shortly after moving into her new place, Beth notices a firefly flitting about in and out of her home, which becomes aggravating and slightly terrifying. However, Beth's curiosity wins over, and she follows the firefly down to the nearby beach. It is there that Beth discovers an old diary written by a young woman years earlier in 1975.