Decades ago, a group of Millwood students were presumed dead after a collapse in the cave they were exploring. Years later, they show up in town, having not aged a day…and with a taste for blood.

Theo and Flora discover some disturbing clues surrounding Annabelle's mysterious disappearance. Meanwhile, it appears that Ruby may not be the only vampire in town.

Theo's mom reveals her version of Ruddy Cavern's mysterious history while the search for Annabelle heats up.