Chapter 30: The Astronomer

In their search for a way to strike down the Water Nation before Seiryu's Moon, the gang- with a little help from Kanna- makes their way to the home of an eccentric woman known as The Astronomer... but Aang is unprepared for what he discovers upon arrival Meanwhile, Princess Katara continues her efforts to convince Sokka of her plan, hopeful he will join her in conquering Ba Sing Sei