Dan Doh!! centers on Tadamichi Aoba, a fifth grader also known by the nickname Dandoh. Dandoh and his two friends are the top players on their school's baseball team, but following an incident involving their principal, they are introduced to the world of golf. They are trained by Shinjō Mikiyasu, a former professional golfer who believes they have the potential to surpass even him. As Dandoh begins competing in tournaments, his friendly nature, determination, and hardworking, competitive attitude draw out the best in the players around him and help him make many friends.