Elliot and Uchenna—and Jersey!—have barely recovered from their first adventure with Professor Fauna when he approaches them with an all-new quest. Except this time they're going to have to cross an ocean. In the mountains of the Basque Country, the Unicorn Rescue Society must track down a missing dragon. But how could someone even kidnap a dragon? And for what evil purpose? And is their newest, fire-breathing rescue more than they can handle?