‘Mousetrap’ Review: A Paranoid Fever Dream About Losing Everything That Makes You You

Netflix’s new Korean thriller drops viewers into a nightmare that feels uncomfortably plausible in 2026, a world where your fingerprint, your name, and your entire digital footprint can simply stop belonging to you overnight. ‘Mousetrap’ follows Moon Jae, a reclusive novelist played by Ryu Jun-yeol, who wakes up locked out of his own phone and apartment, his identity apparently claimed by someone else entirely. The premise alone, rooted in an old Korean folk tale about a rodent that becomes human by consuming human fingernails, gives the show a mythic backbone underneath its very modern anxieties.

Ryu has built a career on playing men whose composure quietly cracks, and Moon Jae is arguably his most vulnerable role yet, a man defined by routine and isolation who suddenly has nothing solid left to stand on. Opposite him, Sul Kyung-gu plays No Ja, a loan shark turned reluctant ally, and the two actors generate a genuinely compelling dynamic built on mutual distrust rather than easy camaraderie. There’s also a police detective circling the edges of the chaos, adding a procedural thread that occasionally intersects with the identity theft plot in interesting ways.

What struck me most watching ‘Mousetrap’ is how effectively it turns a bureaucratic horror into something visceral. The idea that you could be erased from your own life, unable to prove who you are to anyone, taps into a very real modern dread about data, surveillance, and how fragile our sense of self actually is once it’s mediated through screens and systems. The show leans into that dread with moody lighting, a persistent, anxious score, and a color palette that feels perpetually overcast, and for its first few episodes that atmosphere alone is enough to keep you hooked.

Where ‘Mousetrap’ stumbles is pacing. The series takes its sweet time doling out information, and there were stretches in the middle episodes where I found myself checking how much time was left rather than leaning forward. A ten episode structure demands momentum, and this show occasionally mistakes withholding for tension, circling the same paranoia beats without pushing the plot meaningfully forward. The mystery of who the Rat actually is remains intriguing, but the journey to each reveal sometimes drags longer than the payoff justifies.

The performances carry a lot of weight here, and thankfully they’re strong enough to make the slower stretches bearable rather than unbearable. Ryu’s descent into desperation never feels overplayed, and Sul brings a world weary menace to No Ja that keeps you guessing about his true motives well into the back half. The supporting cast, including a standout turn from an actor playing a shadowy tech figure tangled up in the identity scheme, adds texture even when the writing gives them limited room to breathe.

I also appreciated that the show resists turning its central metaphor into something purely supernatural. This isn’t a monster story dressed up in folklore, it’s a psychological thriller that uses the rat mythology as a lens for talking about how technology has made our identities disturbingly easy to hijack. That restraint gives the show more staying power than a flashier, more literal approach would have.

By the time the season wraps, ‘Mousetrap’ leaves you with a story that’s more intriguing than it is fully satisfying, a series that nails its atmosphere and its central performances but never quite solves its own pacing problem. I walked away impressed by the ambition and the craft on display, even while wishing the middle stretch had been tightened considerably. My final verdict lands at 7 out of 10, a genuinely eerie premise elevated by strong lead performances, held back by a runtime that doesn’t always earn its patience.

Have you finished ‘Mousetrap’ yet, and did the ending justify the wait for you? Let me know in the comments whether you’d rate it higher or lower than I did.