Four years after fleeing Tokyo and her toxic relationship with Mikey, Lexi's quiet life in Osaka is shattered when Bonten's merciless leader finally tracks her down—and discovers the four-year-old son she's been hiding.
When Toph reveals her older sister Lexi—an earthbender deeply connected to nature after a childhood herb incident, appointed heir to the Earth Kingdom, and sought after by Ozai—the Gaang learns a new layer to the Avatar world.