2020
S01E16 finale
Korean emperor Lee Gon tries to close the doors to a parallel world which was opened by demons; a detective tries to protect the people and the one she loves.
When a gateway opens to a parallel universe in modern-day Korea, a king must step into another world in search of answers to a long-unanswered mystery.
Gon draws closer to tracking down Lim, and asks Jo Eun-sup to trade places with Yeong. Mail from an unknown sender bothers Koo Seo-ryeong.