Twelve years ago the angels fell to the Earth. Cassie Larke watched as they died on the ground in heaps of broken bone and blood. Now she has found a mysterious man adrift at sea. He claims he"s a ghost, but she has another idea. Maybe he"s an angel. Soon, she finds herself caught in a battle for the mysterious Key. It can open any door; send the angels home or let the demons roam. Hell wants out, and Heaven wants in. Who can stand up for those Between?