Once out of the tunnels, Aang, Sokka, and Katara find that Omashu has been taken over by the Fire Nation. Katara and Aang find the tombs of the two lovers and learn that they became the first Earth Benders and must kiss and trust in love to escape the tunnel. After a cave-in happens, everyone gets separated in the dark.

On their journey to Omashu, the group meets a bunch of Nomads who go with everyone into a tunnel through a mountain to lead them to Omahu. They fight resulting in Uncle Iroh and Zuko going on the run in the Earth Kingdom. Meanwhile, Azula arrives and lies to Zuko and her Uncle about their Father wanted Zuko to come back home.

He attacks the group causing Aang to go int the Avatar State and learn about the State from Avatar Roku. They stop in an Earth Kingdom Military base for supplies and the General wants Aang to attack the Fire Lord immediately by going into the Avatar State. After spending 3 weeks training in the North Pole, The group goes to head to Omashu to find Bumi to have Aang learn Earth Bending from him.

Watch avatar the last airbender book 3 episode 13