A new P.E. teacher has come to the forest school, and a sports summer camp starts. Everyone suffers a lot in the training. Euri Yak makes an escape plan, he and his friends try to carry it out for many times, but they end in vain every time. They become matural day by day and begin to understand the meaning of sports. Euri and his friends make progress as time goes on. With the hard work they make in the camp, everyone gains good results and becomes little sports star in the final competition.