Two young boys and a young girl experience an unforgettable Italian summer filled with gelato, pasta and endless scooter rides. But all the fun is threatened by a deeply-held secret: they are sea monsters from another world just below the water's surface. Y/n is fifteen years old and loves to explore anything above the surface. She, her cousin-- Luca-- and her new friend-- Alberto-- visit the surface and make new friends along the way. But who knows, are they more than just friends, and will their friendship last forever?