The series revolves around Harun Al Rashid's dilemma over which of his two sons he should choose as his successor, Mohammad who's called Al Amin or Abdullah who's called Al Maamoun.

The series touches on the renowned Abbasid caliph Harun Al Rashid's perplexity over who of his two sons he should choose as his successor: Muhammad bin Harun (Al Amin), whose mother is Zubaidah, Al Rashid's cousin, and who is the descendant of the Abbasid family or Abdullah bin Al Rashid (Al Maamun) who is highly educated, wise and an outstanding administrator? Torn by indecision, Al Rashid is finally advised by his minster to appoint Al Amin as his successor to be followed by his brother Al Maamun and so it was! The historical period addressed in the series is rich in details and political vicissitudes shaped by the contradictions inherent in Harun Al Rashid's character, which put his beloved sons in a conflict that had different meanings and causes and became characteristic of that period. That conflict became a lesson to learn from and spun an exciting and intriguing story that rivals in its greatness the famous fairy tales of "A Thousand Nights and a Night"!