Ryu Jun Yeol, Sul Kyung Gu and Lee Kyu Hyung Lead Netflix Thriller Mousetrap

Netflix’s upcoming Korean thriller Mousetrap is positioning a three-way pursuit at the center of its story, with Ryu Jun Yeol, Sul Kyung Gu and Lee Kyu Hyung playing men drawn into the search for an elusive figure known only as The Rat. New character stills introduce a case shaped by loss, money and unanswered questions before the series arrives on August 28.

Adapted from a webtoon, the drama follows Moon Jae, a novelist who has deliberately kept himself apart from the world. That distance is abruptly broken when an unidentified man strips away the foundations of his life: his name, his identity and his fortune. The attack leaves him with a mystery that is intensely personal, but the consequences quickly reach beyond one victim.

A writer forced into the chase

Ryu Jun Yeol’s Moon Jae begins from a position of disorientation rather than control. The character is confronting a life that no longer appears to belong to him, and the investigation becomes his route back to both the truth and a sense of self. The new images emphasize that unsettled condition, placing him in a story where information is scarce and every apparent answer may create another doubt.

That premise gives Mousetrap a psychological edge alongside its crime-thriller framework. Moon Jae is not simply trying to identify an enemy; he is trying to understand how someone could so completely rewrite the terms of his existence. The series describes the pursuit as one in which reality and deception become increasingly difficult to separate, suggesting that the mystery may challenge the assumptions of both its characters and viewers.

An uneasy alliance with a loan shark

Moon Jae does not undertake the search alone. Sul Kyung Gu plays Noja, a loan shark whose own missing money connects him to the bizarre incident surrounding the novelist. Their partnership is founded on overlapping interests, not easy trust, which gives the alliance an immediate instability. Each man wants something recovered, but their reasons and methods are likely to remain distinct.

The released stills present Noja as a forceful presence within the chase. One image shows him pursuing someone with an iron bar, a striking visual clue to the character’s determination and willingness to press forward. His involvement also broadens the stakes: the hunt is not limited to Moon Jae’s stolen identity, but includes a financial grievance that may expose another layer of the case.

For Sul Kyung Gu, the role offers a character whose drive can be read as both practical and unpredictable. Noja’s pursuit of lost money brings him close to Moon Jae’s private collapse, while his blunt approach could prove as useful as it is dangerous. The tension in their partnership will rest on whether a shared target can outweigh their competing priorities.

A detective follows the paper trail

Lee Kyu Hyung completes the central trio as detective Sun Yong, who is investigating the case from a different angle. His stills focus on documents and a wary expression, pointing toward evidence that may reveal the identity or motives behind The Rat. Unlike Moon Jae and Noja, Sun Yong enters the story with an official responsibility to make sense of the growing confusion.

His presence creates a third route through the mystery. The novelist has the strongest personal reason to find answers, the loan shark is motivated by what he has lost, and the detective must sort fact from misdirection. As those paths converge, the drama can test whether the men are chasing the same truth or only different versions of it.

Mousetrap will premiere on Netflix on August 28. Its early materials point to a tense mystery built less around a single clean confrontation than around the shifting relationships among its three pursuers. With a reclusive writer, a relentless creditor and a methodical detective all closing in, the series has set up a hunt in which the most important question may be who is actually controlling the game.