Played by Kang Ha-neul, he is the gentle and thoughtful brother who takes Hae Soo (Ha-jin's new identity) under his wing.

Episode 1 is a sensory feast. It is stylish, loud, and introduces a magnetic anti-hero in Wang So. If you can look past some heavy visual filters and slight pacing issues, you will find yourself instantly addicted to the mystery of the eclipse and the dangerous politics of the Goryeo court. It is a must-watch for fans of historical romance with a dark edge.

This is not the courtly intrigue of The Crowned Clown —it is a horror film dressed in hanbok. The camera lingers on blood seeping through straw mats and the cold indifference of palace guards. For Ha Jin, and for the viewer, the 10th-century court is a place where vulnerability is fatal. Her modern skills—swimming, CPR, emotional transparency—are useless here. When she instinctively tries to resuscitate a drowned court lady, she is met with horror and accusations of witchcraft. The episode systematically strips her of every tool she once relied upon.

Moon Lovers: Scarlet Heart Ryeo episode one follows 21st-century woman Go Ha-jin, who is transported back to the Goryeo Dynasty during a total solar eclipse. Awakening as Hae Soo, she navigates a dangerous royal court filled with princes and political intrigue. Watch the episode on Rakuten Viki or Apple TV.

Played by EXO's Baekhyun, providing early comedic relief.

The episode begins in modern-day Seoul, where we meet (played by IU), a 25-year-old woman whose life has hit rock bottom after being betrayed by her boyfriend and left with crushing debt. While drinking by a lake, she shares her woes with a mysterious man who tells her that her life could only truly change if she died and came back to life.