Sahara is the most competitive girl in the fourth grade. She has been practicing on riding a bike without training wheels for the summer bike race, and she has been studying for her final exams too. However, she cannot wait for the end of school to challenge Crystal in the summer bike race and outscore her on their final exams. Sahara has been friends with Sharon, a girl who is always a good wingman for the adventures to come. The two girls practice every day for the summer bike race without training wheels, pushing themselves to the challenge of being independent girls and competent students. With a bit of trouble, they find the solution to a good race.