Dortoka Uhartea (2003)

Original title: Insel der Schildkröte

Nine-year-old Ainhoa, who suffers from chronic asthma, swam alone to a small island that lies like a petrified giant turtle in the bay of San Sebastián. Ainhoa imagines she is an alien and begins to explore the island. She cannot tolerate the Earth's atmosphere and finds it difficult to breathe...