Danny Dragonbreath and his friend Wendell get an up-close underwater tour of the Sargasso Sea from Danny's sea-serpent cousin, encountering giant squid and mako sharks--and learn about standing up to bullies in the process.
Danny Dragonbreath and Wendell travel to Mexico to visit Danny's bat specialist cousin, but when a giant bat monster kidnaps Danny, Wendell gets his chance to play hero and save his friend before the bat monster makes Danny a permanent addition to her bat family.
Danny's mother has disappeared into a fairy ring growing in her backyard vegetable garden, and Danny and his friends, Wendell and Christiana, must go to Faerie to try to save her.