1904. J.M. Barrie, a Scottish playwright, is struggling to save his name after his latest play closed after preview night. Whilst sitting in the local park he meets the young Llewellyn-Davies boys, George, Jack, Peter, Michael and Nicholas. As his marriage collapses and his theatre producer begins to lose faith in Barrie, the boys help him rekindle his imagination and teach him a thing about believing in magic. Their mother, Sylvia, and the boys become an integral part in the penning and production of Barrie's most memorable play, 'Peter Pan'.