Seems the butler (I believe played by Dick Van Dyke) has turned thief to keep a much-loved elderly lady in her home. She's oblivious to what's going on because of research she is doing on a book she's writing. There are plans galore from the butler and the help, throughout the movie, but it all blows up in their face. When all hope is lost, the old lady comes through with a huge check for the book she just wrote, and all is well. What's the name of that movie?