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Netflix’s Mousetrap dropped all ten episodes on August 28, 2026. It is based on the webtoon Field Mouse and rooted in an unsettling Korean folktale about a rat that can steal a person’s identity after eating their discarded fingernails. The series turns that premise into a modern conspiracy thriller. If you’ve finished the finale and need help untangling exactly what happened, here’s the full ending explained.
Warning: Spoilers Ahead For Mousetrap Korean Drama
Moustrap Plot
The story follows Je Moon-jae, a reclusive novelist whose life is upended when his fingerprint stops unlocking his own phone. He soon discovers that his name, face, fortune, and entire identity have been stolen by a mysterious figure known only as The Rat. Unable to prove his identity, Moon-jae is forced into an uneasy alliance with Noja, a ruthless loan shark who was hunting him for debt long before any of this started. Meanwhile, demoted detective Park Sun-yong begins connecting threads between Noja and the man now walking around wearing Moon-jae’s face. The show is directed by Kim Hong-sun and stars Ryu Jun-yeol and Sul Kyung-gu.
Mousetrap Korean Drama Ending Explained: Who Is The Rat?
The final episode reveals that the person who stole Moon-jae’s identity in the present is a man named Yu Min. But the twist goes deeper than that: Moon-jae himself had stolen Yu Min’s life, work, and past years earlier, which flips the entire narrative on its head. The series spends nine episodes framing Moon-jae as the victim, then dismantles that idea completely in the finale.
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What Is Moon-jae’s Real Identity?
It turns out the writer’s real name is Park Chan-u. From childhood, he assumed the identity of Je Moon-jae, effectively taking his older brother’s place within the family. The older brother is none other than detective Park Sun-yong. He later tried to erase that history entirely by starting a fire before a school trip, burying the truth of who he really was.
What Happens To Moon-jae In The End?
Moon-jae survives the final confrontation and legally reclaims his stolen name and home. But that legal victory turns out to be hollow. He ends up completely isolated, unable to write, and trapped inside the very lie he spent years constructing. Moon-jae gets his identity back on paper, but not his sense of self. The show strips Moon-jae of a happy ending by subverting the narrative.
What’s In The Manuscript Yu Min Left Behind?
When Moon-jae returns home, he finds the manuscript for Mousetrap Volume 2, which Yu Min left for him. It is not only a detailed account of the impostor’s crimes, but it also exposes Moon-jae’s own plagiarism and the cruelty of his past actions. If published, it would destroy his career. Moon-jae tries to rewrite the manuscript to paint Yu Min as unstable, only to realize he can’t produce a single usable page without leaning on his rival’s talent. This serves as final, damning confirmation of just how much of his success was never really his.
What Does The Final Scene Mean?
In the closing moments, someone pounds violently on Moon-jae’s door. The voice belongs to Seung-gyu, who’s come to collect an outstanding debt. As Moon-jae grabs a knife and looks through the peephole, he sees Yu Min’s face instead. That apparition is a manifestation of Moon-jae’s guilt and paranoia. The scene ties directly back to the show’s title: even though Moon-jae has legally reclaimed the life he stole, he’s built himself a psychological mousetrap he can never actually leave.
Is There A Season 2 Of Mousetrap?
Mousetrap is billed as a limited series. At the time of this writing, there has been no announcement of a second season. However, the story builds itself around the plot well and gives a complete answer to the plot twists as the finale comes up on screen. The story is well presented within the 10 episodes and does not need any additions to tie up the narrative.
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