A German family Keller arrives to the coastal village to spend summer holidays with their Croatian friends. Horst Keller and Roger Katushic were friends ever since Karl May`s film adaptations took place there. Their children were friends for years, too, and they look forward to the reunion. Fantasizing about free life and "cowboys & Indians" adventures in the canyon of the Cetina river, the boys go there without knowing that the three cruel Chetniks who had just escaped from prison hide there.