Rosa is a young rebel girl who lives with her grandmother and her uncle in a remote part of Calabria, in Southernmost Italy. Her mother's untimely death when Rosa was a child casts a gloomy shadow on her present life.
Luca and his best friend Alberto experience an unforgettable summer on the Italian Riviera. But all the fun is threatened by a deeply-held secret: they are sea monsters from another world just below the water’s surface.