Simplify the following text for a Grade 11 native English-speaking person.
Original: Prospero and his court are presented as indifferent to the sufferings of the population at large , intending to await the end of the plague in luxury and safety behind the walls of their secure refuge , having welded the doors shut .
Simplified: Prospero and his court show their indifference to the sufferings of the population and intend to await the end of the plague in luxury and safety behind the walls of their abbey .