An American hero is back! The adventure continues!
Balto's son Kodi works for the US Mail. Kodi loves his job and his new friends, - Dusty, Kirby and Ralph. Balto is intrigued by the new bush plane that has arrived in Nome. He wishes to fly, just like the plane. When the pilot, Duke, offers to take the place of the mail-dogs, Kodi and his friends are worried that they might lose their jobs. They have a resentment against the pilot. Meanwhile, Boris falls for a female goose named Stella. She asks him to fly with her, but Boris is afraid of heights. He waits until the last moment before he eventually lies to her, claiming that he's suffering from numerous injuries that prevent him from flying.
A race is organized between the dog-sled team and the bush plane. Kodi wants his father to lead his team. Balto is not so sure, but after a little convincing from Jenna, he accepts the offer.