Palko is part of a mystery, several in fact, but he doesn't know that. The only mystery he knows is the one that involves the hidden cave and the secret book that shows the way to the Sunshine Country - and Palko longs to go there. He has heard that in that land there is no darkness or fear, sickness or weeping. Soon he has his grandfather, Uncle Martin and the whole village wondering about the amazing little book that tells them such wonderful truths about the love of God and the forgiveness of sins. Even Father Malina starts to ask questions.
But then there is the mystery about Palko's past and another little boy who went missing - Uncle Martin is trying to find him and Palko promises to do the same. Will they find the little boy after such a long time? Are they in fact looking in the right place? Perhaps the mystery isn't so mysterious after all.