Decades ago, a group of Millwood students vanished after a collapse in the cave they were exploring. Years later, they show up in town, having not aged a day…and with an unusual thirst they'll stop at nothing to quench.

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

Ruby relives some painful memories about her time spent in the caves and reveals some dark secrets about how the teenagers transformed into bloodthirsty vampires.

In the Season Finale of Red Ruby, tensions mount as Theo and Charlie team up to save Flora, Annabelle, and their town from the increasingly blood-thirsty vampires.