in the beginning of the story we meet the protagonistes Aang, Sakka, and Katara. they are on a quest to help Aang become the Avatar, the Avatar is one person that can bend all four elements fire, water, air, and earth. aang is a air bender that still needs to learn the rest of the elements.
in this scene the main characters have made it to the earth kingdom where Aang finds a ancient airbender pendent. and the seller says that some man traded it for medicinal herbs two days ago and Aang is surprised because all airbenders are dead except for him so he asks the man where the guy that traded it is or where he got it.
when Aang and the other leave the earth kingdom the find a old man who is the former earth king who got kicked out because of the fire nation. Sakka tries to teach the earth king's pet bear how to be a bear. but ended up failing.
this scene is introducing a character named Uncle Iroh he is part of the fire nation. But he betrayed the fire nation and is now being taken to the fire kings daughter Azula.
in this scene the protagonist have met a new person toph a blind, earthbender, who flies with them to the fire nation were they disguise themselves to look like they are from the fire nation.
this scene is showing Aang and Katara braking up a fight between one of the former earth king and toph to see how was a better earth bender. but because everyone stopped the fight from continuing and have the fire army possibly, find them they called it a draw and said they would have a rematch later.