He's present at a gathering of Qartheen dignataries attended by Daenerys, accompanied by her protectors, and Xaro Xhoan Daxos. He, along with Spice King and Copper King, turns Dany down when she requests boats. The Silk King will not help her because of his business with House Lannister, as he doesn't want to offend his best customers.
He's present at a session of the Thirteen in which Daenerys accuses the Spice King of stealing her dragons. He's murdered by one of the doubles of Pyat Pree along with the rest of the Qartheen merchant lords after the warlock reveals he stole the dragons and declares Xaro Xhoan Daxos King of Qarth.