Animated adventure about a sled dog team, led by the adventurous husky, Balto. Balto begins to worry that the sled team is under threat, as more and more people are relying on aeroplanes to deliver the mail. A race is set up to see who can deliver the mail fastest - Balto's team, or one of the new bush pilots. But when Balto's team wins the race with no sign of the pilot, he begins to suspect the worst, and leads the gang on an epic adventure to rescue him and bring him home.