Two tiny, aquatic humanoids search for their missing father, a boy battles a lethal allergy to eggs, and an invisible salaryman tries to become a hero.

Mary Smith, a young girl who lives with her great-aunt in the countryside, follows a mysterious cat into the nearby forest where she finds a strange flower and an old broom, none of which is as ordinary as it seems.

Anna, a shy 12-year-old girl, is sent to spend time with her aunt and uncle who live in the countryside, where she meets Marnie. The two become best friends. But Anna gradually discovers that Marnie is not quite who she appears to be.