A blend of fact and fiction Kate and the Composers follows Kate Bourke a young girl who emigrates from Ireland with her family to make a new life in Toronto in the late nineteenth century. After leaving school in Grade 8 to help support her family she works as a maid and then a proofreader but harbours a secret desire to become a writer. Music is her north star and Kate draws inspiration and consolation throughout her life from her Uncle Frederick's popular song The Flight of Ages. Her marriage to a flautist and composer who is starting a musician's union brings a new set of challenges while she tries to pursue her dream.