The First Bell

When sixteen-year-old Khione of the Southern Water Tribe, Sokka's older twin sister, arrives in Ba Sing Se with the Gaang, she expects to fight a war.

Instead, she finds something worse.

While tending to a feverish caravan traveller in the Lower Ring, Khione recognizes the impossible: swollen lymph nodes, blackening skin, and the unmistakable signs of a plague she remembers from another life. A reincarnated soul from a world that once studied the Black Death in history books, Khione knows exactly what has arrived in the Earth Kingdom, and exactly how unprepared this world is to face it.

The Black Death has come to Ba Sing Se.

And Khione is beginning to understand the terrible truth: This is only the beginning.