You and your brother Wilbur are living at the lighthouse, very close to the ocean. You and Wilbur have a tense relationship because your mother disappeared in the ocean the day you were born. Wilbur is 12 y.o., while you're 6 y.o. All that left from your mother is beautiful painting on the walls of your room, Wilbur's memories of her stories about selkies and other creatures and a shell with holes to blow in it and play on it like flute. You both have a nice and big dog named Cu.