Professor Dorr (Tom Hanks) rents a room from an old widow Marva Munson (Irma P. Hall), instantly charming her with his manners and personality. What Mrs. Munson does not realize though is that the elegant professor is the leader of a criminal gang planning to break into a casino money storage - from her cellar. Pretending to be an orchestra, the gang asks for permission to have music rehearsals in the cellar and starts digging a tunnel to the casino. The perfectly planned-out operation goes wrong in the very end, and the landlady finds out about the robbery. Since Mrs. Munson refuses to forget what she saw and insists on the criminals returning the stolen money, they have no other choice but to, well, kill her. Which turns out to be easier said than done.
The movie is fun to watch, if you don't mind dark comedy. What I did not like though is frequent profanities. I have not seen the 1955 original version with Alec Guinness, but I would bet some good money that it had managed to tell the same story and be just as funny, if not more, without all the cussing.