In an effort to give their younger brother Norman a project to keep him busy now that he has joined the family publishing house, the older Warne brothers agree to publish Miss Beatrix Potter's first children's book. They don't expect the book to sell well, but they need to keep Norman busy. As a single woman living in Edwardian London, Beatrix suspects this endeavor may provide her with a small measure of freedom. But she also has very specific ideas about how the book should be published. As they work together, Norman and Beatrix become close. After the first book is published, Beatrix goes on to a second book and that sells well. One day at lunch, she meets the rest of Norman's family, including his sister Millie and the two women become fast friends. Norman proposes, but Beatrix's parents object to the marriage proposal. After much argument, they agree to let Beatrix marry Norman provided they wait until the end of the summer.