Park Seo Joon Offered Lead Role Opposite Park Hae Il In Lee Joon Ik’s New Historical Mystery Film

Park Seo Joon may be heading toward one of the most historically charged roles of his film career. According to a July 2 report cited by Soompi, the actor has been offered a lead part in the upcoming film I Am a Firefly, a working title for a period mystery set during South Korea’s military dictatorship era. Park Hae Il is also reportedly connected to the project, setting up what could become a high-profile pairing in Korean cinema if both deals move forward.

Park Seo Joon’s agency, Awesome ENT, responded cautiously to the casting report, saying the film is one of the projects he has received. That wording means his participation has not been confirmed, and the production should still be treated as being in the offer stage. Park Hae Il’s side had not issued a public response at the time of the report, but his reported attachment has already drawn attention because of the film’s ambitious subject matter and the director behind it.

A mystery built around history

I Am a Firefly is described as taking place in 1974, more than two decades after the Korean War. The story follows a detective who has lived under the shadow of the guilt-by-association system, a political and social burden that shaped the lives of many families connected, fairly or unfairly, to people labeled as ideological threats. While chasing a major case that could help him rise professionally, the detective discovers the secret of Hwayong Village, where residents have survived by hiding after pretending to be dead.

The film’s background is rooted in the Bodo League Massacre of 1950, a politically motivated mass killing that occurred after the outbreak of the Korean War. People associated with the National Bodo League and others designated as possible threats were rounded up and detained; many were later executed without due process as government forces retreated. By placing a 1970s investigation against that legacy, the film appears to be approaching history through the language of a mystery thriller rather than a straightforward biographical drama.

Park Seo Joon has reportedly been offered the role of Seol Jun Gyeong, a Public Security Bureau detective whose own father is under government surveillance. The character is described as someone who has survived by conforming to the system and pursuing advancement within it. His investigation, however, gradually exposes the reality of state violence and forces him to question the beliefs and compromises that have defined his life.

Park Hae Il’s reported role adds intrigue

Park Hae Il is said to be linked to the role of Kim Man Seop, known as “Grandpa Button.” The character is an elderly man living near the Public Security Bureau, seemingly displaced and guarded about his past. Beneath that outward appearance, he is described as perceptive and physically formidable, with a past connection to Hwayong Village as its first police substation chief. In story terms, he appears positioned as the figure who can guide the detective toward the village’s hidden truth.

If Park Hae Il accepts, the casting would give the film a second actor strongly associated with serious, character-driven Korean cinema. His presence would also create a compelling contrast with Park Seo Joon, whose career has moved across romantic comedy, television hits, action, and international projects. A story that pairs a younger system insider with an older witness to concealed history could give both actors room for restrained, morally complicated performances.

Lee Joon Ik returns to familiar terrain

The project’s director, Lee Joon Ik, is another reason the report is attracting interest. Lee has repeatedly explored Korean history through intimate human stories, including films such as The King and the Clown, Dongju: The Portrait of a Poet, Anarchist from Colony, and The Book of Fish. His filmography often focuses less on spectacle than on conscience, survival, language, memory, and the personal cost of living through turbulent political moments.

That track record makes I Am a Firefly a potentially significant project even before casting is finalized. The premise suggests a film that could connect genre suspense with national memory, using the detective’s pursuit of a case to examine how violence, fear, and silence continue shaping ordinary lives long after the original event. For Korean entertainment watchers, it also points to the continued demand for historical stories that are commercially accessible without avoiding difficult subject matter.

Filming is reportedly scheduled to begin in October, giving the production several months to finalize its cast and move into active preparation. Until agencies or the production team issue confirmations, the safest reading is that Park Seo Joon is considering the role and Park Hae Il has been reported for a key part. Still, the combination of a major director, a politically sensitive premise, and two prominent actors makes this one of the more notable Korean film developments to watch this summer.