Curator of paleontology Dr. Simon Nealy never expected to return to his Pennsylvania hometown, let alone the Hawthorne Museum of Natural History. He was just a boy when his six-year-old sister, Morgan, was abducted from the museum under his watch, and the guilt has haunted Simon ever since. After a recent breakup and the death of the aunt who raised him, Simon feels drawn back to the place where Morgan vanished, in search of the bones they never found.