Ffion and Morlo, two children of the union between a Welsh fisherman and a half-woman, half-seal known as a selkie, search for a way to help their fellow villagers travel to the New World.
Birdy rescues Matthew from his orphan master and discovers that he has a voice of priceless beauty that eventually causes his mysterious disappearance. Will Birdy be able to save him?.
When old Peter rescues a seal pup following a storm, he must decide whether to keep it or to set it free and he must explain his action to the children who have come to love it.
While entranced by the seals that swim off the shore of the Maine island she visits during holidays, sixth grader Molly befriends an interesting girl her age who seems different from other humans.