Behind Zosia's village stretched a green forest, which the children rarely went into. One morning Zosia, with a small rucksack and her favourite teddy bear, decided to go for a walk along a path she did not yet know. Among the tall trees, she heard quiet laughter and sonorous singing. With each step she came to places where the grass was softer and the sun's rays danced on the leaves. Suddenly, under a large oak tree, Zosia saw an old wooden bridge over a silvery stream. On the bridge stood tiny creatures in colourful hats. They were elves! One of them waved to Zosia: - Come on, don't be afraid! We are looking for someone very brave! Zosia walked closer, feeling more and more curious. The elves surrounded her and whispered something mysterious. They pointed to the end of the bridge, where a huge blue lily was growing. - Something unusual was hiding there. But no one has dared to look there so far.... - said the green elf. Zosia took a cautious step onto the bridge. The trees hummed louder. Would she dare to approach the blue lily and discover its secret?