 Aang takes Katara and Sokka to Omashu, where they disguise themselves to make sure no one will panic over the Fire Nation. While having fun, the get caught and sent to the presence of the city s crazy king. Katara and Sokka end up in the danger of creeping crystal rings and the only way they can be freed is if Aang can complete 3 challenges sent by the king. As the day wears on, Aang becomes more impatient and his friends become more trapped in the creeping crystal. After the challenges, Aang finds out that the king is his friend from a hundred years ago, Bumi.