In 1902, in London, the spinster Beatrix Potter lives with her bourgeois parents. Her snobbish mother Helen Potter had introduced several bachelors to Beatriz until she was twenty years old but she turned them all down. Beatrix Potter has been drawing animals and making up stories about them since she was a child but her parents has never recognized her as an artist. One day, Miss Potter offers her stories to a print house and the rookie publisher Norman Warne is delighted with her tales and publishes her first children’s book. The successful selling leads Norman to publish two other books and Miss Potter becomes the best friend of his single sister Millie Warne. Sooner they fall in love with each other but Helen does not accept that her daughter marries a “trader”. However, Beatrix’s father Rupert Potter proposes that his daughter spends the summer with his wife and him in their country house in Lake District and if she is still interested in Norman after the summertime, he would bless their marriage. When Miss Potter stops receiving letters from Norman, she is disappointed. Until the day she receives a letter from Millie explaining what had happened to Norman.