A trip to Scotland turns into mayhem and mystery when young Chloe Walker and Sotol, her pal and partner in adventure, uncover the Walker family secret. Unicorns, flying horses, and a rainbow of picklings lead the duo on another quest. A forbidden castle, veiled in darkness, sheds light on Chloe's unusual aunt as well as the town's strange goings-on. Dr. C. Y. Clops, veterinarian-at-large, brings magical healing to mythological creatures that truly aren't myths at all. When others want to destroy the secret, Chloe and Sotol must do everything possible to protect the hidden truth. Yes, this is more than an underworld.