The moment they arrive home, siblings Katara and Sokka are greeted by a series of surprising new changes: their once-humble village is now bustling with new construction, Gran Gran is maried, and Hakoda is chief of the entire tribe! While Sokka is thrilled, nostalgia weighs heavily on the forlorn Katara. A Northern Water Tribe member named Malina seems to be behind all of these changes and is pushing the North and South to be more unified...but what are her true goals?