Amal and Amane have discovered something remarkable: the location of the protein which allows Derek to walk in the sun, even as a vampire.
Along with Tristan and Esme Vaughn, the grown-up grandchildren of Anna and Kyle, Derek and Sofia set out to learn more about the world from which the protein originates - and, most importantly, its residents.
On arrival, however, they encounter a new, yet mysteriously familiar species...one which may predate even the oldest vampire or Mara - and lead them to question everything they thought they knew.