Dark and Gloom's troubles with the supernatural get bleaker, when their occultist and former supervillain father, who now works for a shadowy government agency, relocates the family to the seemingly quiet town of Ravens Hollow. Their new paranormal problems go far beyond adjusting to a new school and terrible cafeteria food. The magically adept twins along with their new accomplice, the lovable, semi-headless cheerleader, Ditsy, stumble into a massive undead invasion that threatens to tear apart their new home. In their fight to survive, they uncover the town's mysterious connection to an eldritch horror lurking beneath the streets and their father's secret machinations for the power long forgotten.