The series follows one Eijun Sawamura, a baseball pitcher with a very unusual change of pitch that has occurred naturally. Sawamura plans to go with his friends to a local high school and play baseball to the best of their abilities. However one scout from the prestigious Seidou High approaches him and offers him a scholarship and a chance to make it to nationals. Sawamura decides to pay a visit to the school, and it changes his entire outlook on the future. The first season follows Seidou and their main rivals as they attempt to help the upperclassmen make it to nationals during the summer tournament. Once the summer tournament ends, the upperclassmen will be forced to retire, but how far can Sawamura help them go when he currently doesn't have any control?