Prince Prospero invited 1,000 of his wealthy friends for a party because there is the Red Death going around and that is a disease that cause many different symptoms.
The rising action in the story is that the party is getting under way and everyone is forgetting about the world outside the castle that is suffering from the Red Death the only thing that will make you think about it is whenever the clock dings every hour.
A uninvited guest appears and nobody knows who it is but then they start talking about how it looks dead the they figured that it was the Red Death
The party keeps going on and everyone goes back to the party away from all of the other people so then they hear the clock again.
The clock rings and everyone dies at the end and there can be many themes to describe the shorty story but the one that I thought of the most is everyone should be treated the same