Eli has been taken prisoner by Dr. Blakk. His friends have turned Slugterra upside down and still they can't find him. A mysterious girl frees him and after that crazy things start happening. What ties does she have to the Shadow Clan? To Twist? What is her connection to the Shanes and the secrets they hold so dear? A destiny and a pair of ancient slugs.

New city. New dangers. With the academy destroyed along with the rest of Dragon City in a devastating earthquake Artha and co. have nowhere left to go for races and training except the one-and-only Dawn Scale City. Can he survive the new environment and an all out war with an ancient force once sealed away by the original Dragon Booster? Who else will he encounter on this journey?