Mistério da Ilha was released in the year 1994。Mistério da Ilha is also called as The Secret of Roan Inish, Segreto dell'isola di Roan, Secreto de las islas de las focas, Secreto de Roan Inish, Roan Inishin salaisuus, Mellan land och hav, Geheimnis des Seehundbabys, Secret de Roan Inish。

10-year-old Fiona is sent to live with her grandparents in a small fishing village in Donegal, Ireland. She soon learns the local legend that an ancestor of hers married a Selkie - a seal who can turn into a human. Years earlier, her baby brother washed out to sea in a cradle shaped like a boat; someone in the family believes the boy is being raised by the seals. Then Fiona catches sight of a naked little boy on the abandoned Isle of Roan Inish and takes an active role in uncovering The Secret of Roan Inish.