This fantasy film starring Maggie Smith is the story of a thirteen-year-old boy named Tolly staying with his grandmother in the country in 1940s England. Grandmother lives in a very old house built during the time of the Normans. While living there, young Tolly travels back to the time of Napoleon and meets some distant ancestors.
This film was adapted from the second of the Green Knowe books by Lucy M. Boston, The Chimneys of Green Knowe (released in the US as Treasure of Green Knowe). From what I have read, most people are enchanted by the movie with the exception of those who have read the book before seeing the film. Since I had not read the books, I too loved the film, but I have to agree that the film could have been much better if it had stuck closer to the book.
Nevertheless I still recommend seeing From Time to Time. Although the books were written for children, if you like things British, you will thoroughly enjoy them.