Flynn leads his fellow Librarians on a mission to rescue kidnapped Charlene, unwittingly ensnaring them in a subterranean trap filled with ancient Egyptian werewolves, led by nemesis Apep, who are determined to kill the Librarians once and for all.

After seeing a vision of her own death at the hands of a supernatural assassin, Baird tries to cheat fate and stop the deadly prophecy from coming true.