The new season opens as Callum and Rayla finally enter the magical land of Xadia, and begin the last and most dangerous leg of their journey to reunite Zym with his mother, The Dragon Queen. Meanwhile, Ezran returns to the kingdom of Katolis to take his place on the throne, only to be immediately pressured to go to war with Xadia. Lord Viren, who is imprisoned and desperate, begins to realize the power of his new ally – the mysterious Startouch elf, Aaravos. Season 3 of The Dragon Prince premieres on November 22, 2019.
Source: Youtube video description