Louie est un enfant de 8 ans, vivant dans la ville fictive de Cedar Knoll, dans le Wisconsin. C'est un jeune garçon très sensible et impressionnable, mais aussi intelligent. Il utilise souvent son sens de l'humour pour faire face aux situations difficiles.
Louie makes a deal with his Dad to get out of his much-hated gym class if he agrees to play little league baseball. Much to Louie's dismay and bad luck, his baseball coach ends up being his tyranical gym teacher. After the coach is hit in the head by Louie's bat during a game Louie's dad Andy steps in as the coach and whips the team into shape in true military fashion--literally. While Andy is teaching the team battle strategies, Louie's mom teaches them actually baseball tips and tricks on the side. Of course in the end, Louie's team ends up in the big championship game and the team's newfound skills are put to the test.