A Journey to the Beginning of Time

Four Czech schoolboys embark on an awe-inspiring expedition back through time, where they behold landscapes and creatures that have long since vanished from the earth. In a rowing boat, they journey upstream on a "river of time" that flows through a mysterious cave, emerging on a strange, primeval landscape. As they make their way through prehistoric eras, the boys face various perils and learn about the ancient world in this visually stunning and groundbreaking science fiction adventure.