This is based on a true story about a coach of a high school baseball team who'd like to change people's mind in Okinawa through baseball. Hiroyoshi Sai is assigned as a coach to the baseball team at Ryukyu Fisheries high school. The baseball team members are welcome the arrival of the capable coach Sai, but he recruits skillful players for next freshmen from all over Okinawa. His target is just to win the National High School Baseball Championship, called "Koshien" in up-coming couple of years. However, teachers and students around the school get suspicious about his way of coaching with an iron fist.