Andreas arrives on a remote Greek island to sell a plot of land inherited from his uncle. But who would buy a barren, rocky field with a stone hut? In order to sell the plot Andreas has to pay off a debt his uncle ran up with Yiannis, a local farmer.
Friendship, courage and ingenuity are put to the test once again as Pertsa, Kilu and Pirkko embark on an epic adventure to solve the mystery of an old map. Twin girls Vappu and Kerttu also join the flight, and the suspense is increased when the cunning criminal Annabella Pehko jumps on board as a stowaway.