Ages 9 - 12 Years All aboard for Maggie's latest adventure with her magical boots! Maggie's attempt to fit in at her new school backfires during a disastrous tryout for the swim team. At a loss for how to handle all of the drama, Maggie decides to take her Mostly Magical Boots for a spin, this time trying on the life of Marina Tide, daughter of a famous oceanographer. She figures it'll be all sunbathing and ocean breezes. But once aboard, Maggie finds that things aren't how she expected. There's a treasure-hunting traitor aboard and it's up to Maggie to save the crew and the coral reef before her time runs out.