During the exposition we are introduced to the setting and rooms. and we can get an idea of what time period the story takes place we are also introduced to the characters, Prince Prospero and the rest of the party.
In the rising action Prince Prospero and his thousand nobles start the party and with each passing hour the time they have to live eventually comes to an end.
The Prince and his thousand Nobles lock themselves in the castle to escape death.
The nobles see the mysterious figure and Prince Prospreo gets spooked and slightly mad and starts screaming for the person who ruined his party. The figure reveals him self and chases the Prince.
The prince is chased until he ends up in the black room.