Granhyttan in Sweden used to have rich mines. One day a suspicious couple, Signe and Orvar, arrives in the small town and retires in a purged hut. Nobody knows what they up to; but strange things starts to happen when a young boy, Staffan, finds a piece of shining metal, while playing in a mine.

Pippi Longstocking, accompanied by friends Tommy and Annika, adventures on the South Seas to search for her father, who has been kidnapped by pirates.