The little One is deeply saddened: Because she made a small calculation error, she couldn't offer enough food to her number friends. She feels uncomfortable that she can't calculate as well as the other numbers. Luckily the Master of Numbers is there to help her. He tells her of the castle of the Numbers Fairy, where she can finally lose her fear of math problems. But only the one who reaches it first can claim the valuable treasure. The number friends start a race. Their way is full of math problems and exciting challenges. Who will be the first to reach the castle of the Numbers Fairy?