After witnessing Fuji Kiseki win a race, young Jungle Pocket is inspired to become the fastest horse girl alive. Training alongside Fuji and her veteran trainer, Pocket's goal looks to be within reach—right up until she encounters Agnes Tachyon. In the face of Tachyon's impossible speed and polar opposite personality, beating Tachyon becomes an obsession. But all too soon, that obsession becomes a looming specter—the final barrier that stands between Pocket and her dream.