05 September,2026 10:10 AM IST | Mumbai | mid-day online correspondent
Mousetrap poster (Picture via Netflix)
Mousetrap has quietly emerged as one of the more intriguing Korean thrillers, largely because it takes a familiar piece of folklore and turns it into an unsettling mystery about identity, deception and human nature.
At the heart of the Netflix series is an eerie Korean folktale about a mouse that eats a person's discarded fingernail clippings and transforms into an exact copy of them. What could have remained a straightforward supernatural horror premise instead becomes a psychological thriller that constantly makes viewers question what is real.
The series benefits significantly from Ryu Jun-yeol's performance. The actor plays both writer Moon-jae and his mysterious doppelganger, creating a fascinating contrast between the two characters. Rather than depending on exaggerated transformations, the distinction comes through subtle changes in behaviour, expressions and personality.
Ryu has also highlighted the larger questions at the centre of the story, particularly its exploration of identity and the idea of whether we can truly recognise the people around us. While talking at the press conference in Seoul as reported by The Korean Herald, Ryu mentioned, "Looking at the original webtoon, I felt that the writer was not simply telling a story for the sake of entertainment or excitement, but had a very distinct philosophy and used the story to explore some profound ideas."
Another reason Mousetrap works is its willingness to embrace an unusual narrative. Moon-jae finds his identity and life being gradually taken over, while his financial troubles bring him into contact with No-ja, a loan shark played by veteran actor Sul Kyung-gu. Their unexpected connection adds dark humour to an otherwise tense story.
The show's appeal also lies in how it blends genres without becoming predictable. Folklore, psychological suspense, dark comedy and mystery coexist within the narrative, giving Mousetrap a tone that feels different from more conventional K-dramas.
Its central premise may sound bizarre at first, but that strangeness becomes one of its biggest strengths. The series repeatedly encourages viewers to question appearances and wonder whether the person in front of them is really who they claim to be.
For Ryu, playing two versions of the same character also meant finding nuanced ways to communicate their differences. The actor's restrained performance allows the tension to build gradually rather than relying solely on conventional thriller tropes.
The result is a series that rewards viewers who enjoy slow-burning mysteries and stories that leave room for interpretation. While it may not have generated the same level of buzz as some of the bigger Korean titles, Mousetrap has carved out its own space by turning an unsettling folktale into a smart, atmospheric thriller. That combination of folklore, suspense and psychological ambiguity is precisely what makes Mousetrap an underrated watch.
