Lanie wakes to find herself locked away in a mysterious bunker under the watchful eye of Dr. Sampson. But with Lanie growing more aware of her abilities, Dr. Sampson doesn't realize the power she's up against...

After pleading with Evie to spare Gavin's life, Thurston is caught by Sebastian and his men. When Thurston comes clean to them about Evie's blood-quest, Sebastian proposes a simple solution to their problems - kill the Graysons.