Simplify the following text for a Grade 11 native English-speaking person.
Original: The plot concerns the attempt of the hero Belmonte , assisted by his servant Pedrillo , to rescue his beloved Konstanze from the seraglio of the Pasha Selim .
Simplified: The story is about the hero Belmonte , helped by his servant Pedrillo , who tries to rescue his beloved Konstanze from the seraglio ( palace ) of the Pasha Selim .