The story is set in 1184, when Salah-al-Din is trying to conquer Jerusalem, in the hands of Christians. Among his councillors is a mullah, a kind of Muslim priest. All mullahs belong to the Shiite part of Islam, while Salah-al-Din was a Sunni. And, since the two confessions hate each other, would have really a Sunni king followed any advice from a Shiite one?