Balto and his son Kodi find that technology is threatening the sled dog team's future, as the airplane becomes a faster choice for bringing mail and supplies to Nome. Amidst the controversy, a race to deliver the mail is arranged between a sled team led by Balto and a bush pilot who flies a plane that truly fascinates Balto. When Duke, the pilot, never makes it to his destination, Balto knows something has gone amiss.