 In the film, the Moomins along with Snorkmaiden and Little My sail for the Riviera, where their unity is threatened.Snorkmaiden is dazzled by the attentions of the playboy Clark Tresco and Moominpappa befriends an aristocrat called Marquis Mongaga, while Moomin and Moominmamma decide to move to the beach in order to escape all the glamorous extravagance.