Ben, a young Irish boy, and his little sister Saoirse, a girl who can turn into a seal, go on an adventure to free the fairies and save the spirit world.
During her family's move to the suburbs, a sullen 10-year-old girl wanders into a world ruled by gods, witches and spirits, and where humans are changed into beasts.
Aspiring musician Miguel, confronted with his family's ancestral ban on music, enters the Land of the Dead to find his great-great-grandfather, a legendary singer.