The Red Death ravages the people of the country side.
Prospero invites a thousand wealthy unaffected people to barricade themselves in his abbey.
The Prince shows the people how each of his apartments in his abbey are painted to represent the passing day.
Right before the clock strikes midnight, the people locked in the abbey realize that there is an unexpected guest. When the Prince pursued him, he found out that it was indeed the Red Death, who in turn killed the Prince.
As the guests try to catch the stranger, they find out that the only thing to be found under the costume, was the Red Death.
The guests in the Abbey had now acknowledged the presence of the red death. But before they could do anything about it, the Red Death picked them off one by one.