When frumpy senior citizen Archie goes in search of his missing son in the Spanish Canary Islands, he stumbles upon a higher mission: locating a magical cure for his ailing fourteen-year-old granddaughter, Ella. Using a portal-jumping device called the Tillastrion, Archie and a stone-headed creature named Zeno are transported to Jarr-Wya, a magnificent yet terrifying island in a connected realm―along with Ella and her strong-willed mother, Tessa, who accidentally stow away on this not-so-secret quest.