Ben Greenbloom lives on the island of Mimameidr with his adoptive family, which includes Barnabas his father, Vita his mother, and Guinevere his sister. On the island, the Greenblooms protect all fabulous creatures like dragons, trolls, rats, a homunculus, centaurs, ravens, geese, swans and many more. Ben is a dragon rider for Firedrake, the dragon, and during their adventures together; they have become the best of friends.
This story takes off when a Pegasus and his three unborn foals arrive on the island. The inhabitants of Mimameidr must aid the Pegasus and his offspring. In their travels, they encounter griffins, gibbons, krakens, crabs, lorises, jackal scorpions, and proboscis monkeys.