As the Strawhats sail across the sea in hopes of reaching Alabasta to stop a civil war, they come across an island. An island not found in any maps. In this island stands an academy of mages. In that academy studies a girl, who will unexpectedly join them on their adventures. Y/N, the timid and nervous girl, being a blessed water mage, will be a useful source in their team, although she sees herself as worthless. Will she find out the truth about her past? About herself? About her powers? Will she unveil the secrets of the seas?