In the wake of a failed attempt to defeat the vampire Richelieu Susan & her friends are weakened & divided. Raphael must set aside his animosity & join with his enigmatic sire Gabriel to discover a powerful weapon before Richelieu claims it. Meanwhile Susan & her cousin Wendy translate a 12th century diary belonging to their ancestor Carissa to learn the origin of their familys connection with the vampires. As Carissas story of love & betrayal unfolds they discover the secrets of the present will only be revealed by solving the mysteries of the past.