Women's competitive cycling had been dormant for decades until the newly established Rinkai League brought the sport back, capturing attention with its initial races. This revival has inspired numerous women throughout Japan, who join the league hoping to fulfill their aspirations of becoming professional athletes. Cycling fan Izumi Itou is hesitant to risk her future on racing, even with her friends' support. Her perspective shifts when she learns that her grandmother was a former champion in women's cycling. Her grandmother offers to train Izumi, aiming to help her see her own potential. Though Izumi has little experience, the arrival of a tough Swiss competitor determined to dominate the field pushes her to give her all on the track and, in the end, secure victory.