In the aftermath of World War I, playwright A.A. Milne, struggling with post-traumatic stress, relocates with his family to the English countryside. Milne becomes inspired by his young son, Christopher Robin, and his collection of toys, which spark the creation of the beloved Winnie-the-Pooh stories. As Milne finds solace and creativity in their idyllic surroundings, he collaborates with illustrator Ernest Shepard to bring the whimsical tales to life. These stories rapidly gain immense popularity, providing an escapist comfort to the public during interwar periods.

However, as the Winnie-the-Pooh series garners widespread fame, the family grapples with the unintended consequences of their new celebrity status. Christopher Robin is thrust into the limelight, and his childhood becomes dominated by this public persona. This sudden shift challenges the family dynamics, straining relationships and causing emotional turmoil. The poignant journey explores the cost of fame and its impact on personal relationships and childhood innocence.