La Ratonera

It war a great theater work, with only 5 characteres. The story coms of a millionarie old man who is about to die, so, his family comes to his house to know what are going to recibe. But, before to die, the old men is killed by someone in the house, and comes a detective to investigate the case. But, the detective wants the money and with the butler, kills the family to have the money.
This is my perspective of the "La Ratonera", another people have a different opinion and if i mistake in something, please comment to i have a better undestanding of the story.
The history was written by Agatha Christiein 1952.