Avatar the last airbender

[Xalibar]

is this game just follow the episodes of the show, or is it like a side story taking place in between?

[Renmiri]

A new story.

It starts with the gang at the North Pole where Ang and Katara are learning Water Bending. The first mission is there, then Katara gets captured by Prince Zuko and you have to infiltrate the Fire Nation to get her back. This is where I'm at (second chapter).