Season 1

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  8.4/10738 votes

  Episode 1

  Season 1 Episode 1 - Aired 4/17/2020

  Lee Gon mourns the tragic death of his father. Lee Lim goes on the run — and finds escape when he comes across a door to a parallel universe.

  Director: Unknown

  Writer: Unknown

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  8.1/10653 votes

  Episode 2

  Season 1 Episode 2 - Aired 4/18/2020

  Gon insists he is an emperor from another world. An incredulous Jeong Tae-eul takes him to the police station, where he sees a familiar face.

  Director: Unknown

  Writer: Unknown

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  8.2/10625 votes

  Episode 3

  Season 1 Episode 3 - Aired 4/24/2020

  Though Tae-eul finds Gon's story difficult to believe, some things about him are completely inexplicable. At work, she gets busy with a murder case.

  Director: Unknown

  Writer: Unknown

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  8.6/10614 votes

  Episode 4

  Season 1 Episode 4 - Aired 4/25/2020

  When Tae-eul loses her police badge, she can't help but think about Gon. Meanwhile, Kang Sin-jae has had it with his mother's bad habits.

  Director: Unknown

  Writer: Unknown

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  8.6/10610 votes

  Episode 5

  Season 1 Episode 5 - Aired 5/1/2020

  Being introduced to Gon's world is a lot to process for Tae-eul, who's taken to the palace. A disgruntled Jo Yeong keeps an eye on her.

  Director: Unknown

  Writer: Unknown

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  8.4/10604 votes

  Episode 6

  Season 1 Episode 6 - Aired 5/2/2020

  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.

  Director: Unknown

  Writer: Unknown

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  8.3/10594 votes

  Episode 7

  Season 1 Episode 7 - Aired 5/8/2020

  Gon brings Yeong along on his trip back to Tae-eul. He has a favor to ask of her, while she's found something troubling to share with him.

  Director: Unknown

  Writer: Unknown

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  8.3/10591 votes

  Episode 8

  Season 1 Episode 8 - Aired 5/9/2020

  In Corea, Luna is set free. In Korea, Gon and Yeong run into a man who recognizes them, and Sin-jae experiences childhood flashbacks.

  Director: Unknown

  Writer: Unknown

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  8.6/10590 votes

  Episode 9

  Season 1 Episode 9 - Aired 5/15/2020

  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.

  Director: Unknown

  Writer: Unknown

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  8.6/10588 votes

  Episode 10

  Season 1 Episode 10 - Aired 5/16/2020

  On Lunar New Year, Gon and Lim come face-to-face in a public standoff. Tae-eul opens up to Sin-jae about the other world and her ongoing case.

  Director: Unknown

  Writer: Unknown

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  9.0/10671 votes

  Episode 11

  Season 1 Episode 11 - Aired 5/22/2020

  A compelling offer finds its way to Luna. Gon's investigation into a devastating murder leads him to an old traitor and a clearer idea of Lim's schemes.

  Director: Unknown

  Writer: Unknown

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  9.0/10624 votes

  Episode 12

  Season 1 Episode 12 - Aired 5/23/2020

  Frightening circumstances land Tae-eul back in Gon's arms. When Yeong runs into a woman who looks strikingly familiar, he follows her.

  Director: Unknown

  Writer: Unknown

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  8.9/10566 votes

  Episode 13

  Season 1 Episode 13 - Aired 5/30/2020

  Knowing Seo-ryeong is up to no good, Gon throws her in a tight spot. Upon returning to her world, Tae-eul realizes Luna is there, too.

  Director: Unknown

  Writer: Unknown

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  9.0/10583 votes

  Episode 14

  Season 1 Episode 14 - Aired 6/5/2020

  Gon and Tae-eul are separated when he sets out to fulfill what's been his fate all along. Sin-jae makes a startling discovery.

  Director: Unknown

  Writer: Unknown

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  8.6/10551 votes

  Episode 15

  Season 1 Episode 15 - Aired 6/6/2020

  Lim plots his next meeting with Gon. Understanding there's only one thing he can do to right wrongs, Gon comes to a heart-wrenching decision.

  Director: Unknown

  Writer: Unknown

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  8.5/10542 votes

  Episode 16

  Season 1 Episode 16 - Aired 6/12/2020

  A final attempt to put a stop to Lim's ambitions comes with profound consequences. Gon travels far and wide in search of Tae-eul.

  Director: Unknown

  Writer: Unknown