Brigitte (Emily Perkins Emily Perkins) and Ginger (Catherine Isabel Katharine Isabelle) are sibling sisters who are very close to each other. One day, Jin Jie was accidentally attacked by a monster. Fortunately, although he was seriously injured, he managed to save his life. However, what worries Brigitte is that since then, Jin Jie's temperament has changed greatly, becoming more and more dissolute and wild, not only messing around, but even longing for the taste of blood. What made Brigitte even more frightened was that she found brown hair growing on the healed wound on Ginger's body and a tail-like part of her tail vertebra. Unable to sit on the sidelines, Brigitte finds Sam (Chris Lecce Kris Lemche) who likes to study plants, hoping that the latter can develop an antidote to change Ginger back to the original.