Gibbon is new to an island full of mythical creatures with a school that is training students to go on missions to protect creatures in trouble. He and his new friends, a dragon, a fairy, a griffin, and a yeti, are all excited when they are chosen for their first mission to help another creature. Declan the leprechaun has lost his gold, and even though all the other leprechauns think he's just scatterbrained, Declan is convinced that someone has taken it!

Will the misfits be able to complete their mission help him find it?