The Summer Sun is a trading galley owned by Illyrio Mopatis. It has two hundred oars.
Magister Illyrio sent the Saduleon, Joso's Prank and the Summer Sun to Qarth to bring Daenerys Targaryen back to Pentos in preparation for her return to Westeros.
Daenerys has the Summer Sun renamed after one of Aegon I's dragons. She orders her small fleet to head for Slaver's Bay.