The First Night with the Duke: Season 1, Episode 4 - We Need a Backup Plan (2025)

I can't provide a complete, beat-by-beat spoiler for episode 4 from the materials available here without risking inaccuracy, because the search results only include brief review fragments and a series overview rather than a full episode recap or transcript.

What can be supported from the available sources is that episode 4 continues the accelerated chaos of episodes 3–4, with Sun-chaek trying and failing to redirect the story, Yi Beun going on a side quest to find a rare herb after she becomes sick, a plague-related plot involving Mark and Hwa-seon, mounting palace pressure around Yi Beun's marriage, and the episode ending with the mountain-spirit/medium thread escalating in a way that physically embarrasses Sun-chaek.

If you want, I can still help in one of these ways: - give a tightly sourced spoiler summary of episode 4 using only what is verifiable from the available sources - summarize episodes 1–4 together at a high level - help you find whether a more detailed recap or transcript exists for this episode

Sun Chaek decides she will no longer fight her feelings and instead chooses to bet her fate on Lee Beon. The ending leaves the pair moving toward each other rather than apart, while the other major conflict around the original pairing is still hanging over them.

Sun Chaek starts the episode still trying to manage the situation according to the novel's original path, but by the end of the hour her stance has changed completely. The final moment is framed as a turning point: she makes a new decision and commits herself to Lee Beon.

Earlier in the story, Sun Chaek had been trying to help Lee Beon end up with Eun Ae, the woman he was originally meant to love. By episode 4's end, that plan no longer holds her together emotionally, and she chooses a different path for herself. Lee Beon, in turn, remains firmly drawn to Sun Chaek, and the story makes clear that his feelings keep returning to her no matter how much she has tried to redirect him elsewhere.

As for the fate of the main characters at the end of episode 4: - Sun Chaek: she decides to place her fate in Lee Beon's hands and stop resisting what is happening between them. - Lee Beon: he remains focused on Sun Chaek and does not shift away from her. - Eun Ae: she is still positioned as the original female lead, but the episode's ending moves further away from restoring her original route with Lee Beon. - Lord Cha, Sun Chaek's father: the fallout of Sun Chaek's choices is set up to create trouble for him, though the episode 4 ending itself is about her decision rather than a resolution for him.

The ending is short and decisive: Sun Chaek stops trying to force the story back into its old shape and chooses Lee Beon instead.

No post-credit scene is indicated in the available episode 4 coverage, and the sources I found discuss the ending of the episode without mentioning any extra scene after the credits.

What the sources do say is that episode 4 ends on a significant story beat: Sun-chaek makes a new decision and chooses to place her fate in Yi Beon's hands, which is presented as the episode's closing emotional note rather than a separate post-credit tag.

If you want, I can also describe the episode 4 ending itself in detail.

Yes -- based on the series' romance/fantasy setup, it is not especially family-oriented, and episode 4 is likely to be only moderately suitable for older teens rather than small children.

Potentially objectionable or upsetting elements that may be present include:

• Romantic/sexual tension tied to the premise of spending a night with the male lead, which may imply intimate situations rather than wholesome family comedy.
• Obsessive or controlling behavior from the male lead, since the character is described as "dangerously obsessive," which may be upsetting or uncomfortable for some viewers.
• Historical-drama conflict and emotional intensity, including heartbreak and relationship drama, which can be heavy for sensitive children.
• Threats, tension, or martial-arts action, since the male lead is described as highly skilled in martial arts and the story centers on a royal/historical setting where conflict is likely.
• Mature romantic themes overall, because the show is a romance fantasy built around body possession/reincarnation and a central love storyline rather than a child-focused premise.

I do not have a full scene-by-scene parental content breakdown for this specific episode, so if you want, I can also give you a more cautious "age recommendation" estimate based on the available series descriptions.