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.
For Louie's birthday, his grandma gives Louie a sweater which she made for him. While trying to write the thank you letter, Louie decides to instead play with his friends. When he finally writes the letter, he finds out his grandma has died.