There are at least two reasons why Robin Whitaker wants to eliminate his wife, Dulcie. He is not allowed to drink any alcohol, nor to gamble.
Dulcie controls his life to an extent that he finds intolerable. But she is also wealthy, so merely leaving her is not an acceptable option.
In most circumstances Dr Whitaker thinks and acts like the very intelligent and highly-educated man he is. However, he has somehow convinced himself that the action of killing his wife is justified. He is also certain that his innate brainpower will give him a significant edge over any police detectives, and allow him to outwit them with ease.
What are his thoughts? How does he make his decisions? What does he do?
Will he get away with murder?