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.
A potential military conflict threatens the kingdom. Gon promises Tae-eul he will return to her, and steps forward to take care of the situation.