Princes Callisto Regis, Soren Helena, Alfonso Galdos, Cesare Oran, and Helios Magan are all princes who were on their way to the Druvian empire to be present at the king's coronation, only for their boat to get wrecked during a storm, and for their subordinates and servants to get gobbled up by a mischievous female siren. They'll do whatever it takes to survive, use their smarts, work together, their bonds will deepen with each other as they try to survive and capture the siren.