On the shores of Marintide, a mysterious artifact washes up, setting skilled fisherman Ewan Tidewalker on a thrilling quest. With the help of a cartographer and a daring crew, he sets sail to uncover a legendary lost city beneath the sea. Battling rival treasure hunters, mythical sirens, and an ancient guardian, Ewan must navigate treacherous waters where secrets and dangers lurk in the depths. Will he unlock the mysteries of the tides, or will the ocean claim its secrets forever?