"Kingdom: Ashin of the North" is a sidequel from Kingdom season two and a backstory about the mysterious character Lee Chang's group encountered on their journey north to discover the origins of the infected. The surprising appearance of Jun Ji-hyun in the role of Ashin at the end of Kingdom season two intrigued audiences. In this eagerly anticipated bonus story, Jun as Ashin will unveil the mystery behind her identity. Park Byung-eun, who made a lasting impression in Kingdom season two as the head of the Royal Commandery Min Chi-rok, is also confirmed to star. The new story will detail what had happened to Ashin in the past in the northern region and how the two characters' fates intertwined.