An ancient predator attacks two civilizations separated by 1,000 years.The residents of the small Mississippi River community of Grafton, Illinois struggle to recover from the destruction of the Great Flood of '93. Little do they realize that flood-waters have opened Bone Cave allowing access into the modern world of the murderous Piasa, the Bird of Evil Spirit.The vanished Cahokian Mound Builder civilization--some 20,000 strong--are similar victims...