A more detailed account here.
Salah has found a survivor from the attack on the Order monastery that is being treated in the Maristan hospital. The characters go to see him and find that the hospital is under the protection of a Nosferatu physician; Musah. The survivor tells the PCs that the two former students of Omar Khayyam are alive and well – nearly a century after they left Nishapur – but are no longer in town. He also tells them that a Yusuf ibn al-Hakam Kohrasani, Aziz' mortal son, recently came to to see him asking the same questions. The Gangrel is devastated at this news, struggling with his moon rage. He demands that they all stay away from Yusuf.
On their way from the hospital they meet Laurence de Chevalliere, whom Colino accompanied from Constantinople almost a decade ago. He is now a beggar, having escaped slavery. Colino arranges for the former knight to return to France. Laurence also mentions seeing Lazlo, one of the traders from that same fateful caravan journey, who lives nearby the Maristan. Later, Salah confirms that Lazlo is Kindred of the Malkavian line.
Kadir claims he needs to find someone who has summoned him and demands that Sir Thomas come along. The two sires leave for a journey into the wilds that is hardly understood by their childer.
At the Prince's request, Aziz meets Barqat, a prominent Assamite with ties to the ruling al-Din family. The characters catch a glimpse of the heir to the family entering Umayyad Mosque. The Assamite wants for the Gangrel to find out if the eldest childe of Antioch's heretic Prince, Abraham, still holds to Allah but was forced to convert and can be approached. Aziz promises to instead set up a meeting with Abraham for the clan. He knows he is out of his depth, but does not know how to refuse the Prince of Damascus and by extension Suleiman.
The monastery of the Order of Saint Addai is a looted and burnt shell of a building that the locals keep well clear of. Most things inside are smashed or rotten. The time measuring device Aziz is after is not present.
Behind a hidden panel in the offices the characters find some letters written in code and a map that apparently shows hidden caches and hiding places around the city. The cypher in the letters proves tough, even for Colino. He keeps at it.
The next night Musah arrives at Salah's estate agitated. He proclaims that Muhammed has been flung from the roof of the Maristan and demands to know what will be done about this blatant invasion into his haven. The neonates reassure the Nosferatu that they had nothing to do with it, but will look into it. Musah leaves furious, shouting that there must be consequences.
The characters decide that they should investigate the two sites on the map that indicate some sort of written repository. They are both close to the Maristan, within a city block from each other, and turn out to belong to scholarly societies of Damascus.
At the first location they find evidence that the former students kept a spherical object – about two feet in diameter – in storage. This object has been stolen.
The second location is an actual library. They dupe the night watchman into letting them in and check the ledgers. They are surprised to find that Lazlo has borrowed works from this library. More disturbingly, so has Yusuf, recently. Aziz struggles to keep the moon rage in check at reading this.
Suddenly they hear a fourth unwanted guest on the top floor. They go up to investigate. At seeing his son, Aziz succumbs to loss and frustration and demolishes the room in a frenzy, killing the watchman. Colino and Christophe grab Yusuf and flee.
Afterward, on the roof tops, Colino tells Yusuf that his father is dead and that there is nothing for him to find in Damascus. Heartbroken, Yusuf agrees. The Toreador offers the young man to contact him should he ever need help.
This offer will form a schism between Aziz and Colino that will never resolve, since the Gangrel cannot forgive what he sees as a unabashed invitation into the Kindred world, the very thing he sought to protect Yusuf from.