A young man is accused of murder of a rich elderly lady - and only his wife can save him.
Wilder's adaptation of the stage play works pretty good on screen, and it is carried to perfection by Dietrich's acting. Her work is simply amazing - and the casting is 1000% perfect. The plot hints at the outcome and Dietrichs reaction is understandable. Maybe a little bit too much was crammed into the ending, and as for all Christie's work, once you know the point the whole thing is a lot less entertaining. Amusing fact: narrator in the end telling the viewers to keep quiet about the ending.
Charles Laughton as Sir Wilfried is a delight to watch.