Chance Matthews is drawn into a battle between angels and monsters because of something in her possession-a fossil of a creature that couldn't possibly have ever existed. But it did. And still does.

Several years after the events in Threshold, Chance and Deacon have married. They're looking ahead to the future, trying to put the past behind them. But new nightmares await them as a woman with a need for violence enters their lives. And something even worse has followed her...