After breaking into a secret lab to find answers, Charlie Wilde and her friends find three more bracelets, but her hopes of rescuing her father are complicated when she has to keep her friends from going completely wild with their powers.

"Devastated by loss and hampered by war, Fifer struggles to regroup and continue the search for her twin. Meanwhile Thisbe, pounded by images of Grimere's dark history, contemplates her abandonment and considers leaving Rohan behind in a risky move that could take her home... or to her death--

Project Chimera scientists try to figure out a way to give Charlie Wilde and her friends new powers from the animal kingdom to use against Dr. Gray and his followers, who are bent on transforming humanity into a monstrous new species, subservient to them.

Trapped underground in the catacombs and made to transport the bones of ancient dragon rulers to the extracting room, where others extract the magical properties dormant in the bones, twin Thisbe must learn how to control her own fiery magic and use it to escape.