Renowned South Korean actor Park Seo Joon is set to surprise fans with a dramatic transformation in his upcoming project, “I Am A Sinner.” Known for his charismatic roles in romantic comedies and action-packed dramas, Park will take on the challenging character of a drug dealer in this gritty underworld survival series.
About “I Am A Sinner”
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Genre: Underworld survival, noir, crime drama
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Based on: The popular webtoon “I Am A Sinner” by Lee Moo Gi
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Character: Park Seo Joon will portray Park Eon Jin, also known as Paeng I, the youngest and most formidable member of a criminal organization.
Plot Overview
“I Am A Sinner” follows the story of Park Eon Jin, who becomes the sole survivor of a violent gold shop incident. In the aftermath, he is drawn into a world of betrayal and chaos. Seeking a way out, he joins a powerful underworld organization and quickly rises through the ranks as a drug dealer. Despite being the youngest in the group, Paeng I is known for his intelligence, ruthlessness, and unyielding ambition. He dominates the narcotics trade, often sparing no one—not even those closest to him—in his relentless pursuit of power.

Park Seo Joon’s Career Evolution
Park Seo Joon has built a reputation for his versatility, starring in hit dramas such as:
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Itaewon Class
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What’s Wrong with Secretary Kim
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Fight for My Way
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Gyeongseong Creature
With “I Am A Sinner,” Park steps into his first-ever noir role, marking a significant departure from his previous “lover boy” image. This new character promises to showcase a darker, more intense side of his acting range, much to the anticipation of his fans and critics alike.
What to Expect
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Intense action sequences and shocking plot twists
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A gripping tale of power, betrayal, and survival in the criminal underworld
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Park Seo Joon in a never-before-seen avatar as a merciless and ambitious drug dealer
Production and Release
While details about the supporting cast, production team, and broadcast platform remain under wraps, the drama is already generating significant buzz. “I Am A Sinner” is expected to follow Park Seo Joon’s upcoming romantic drama, “Waiting for Gyeongdo,” which is slated for release in December 2025.
Fan Reactions
Fans have expressed excitement over Park Seo Joon’s bold choice, eager to see him break away from his usual roles and embrace a more complex, morally ambiguous character. The adaptation of a popular webtoon and the promise of a raw, unfiltered look at the underworld have only heightened expectations.
“I Am A Sinner” is poised to be one of the most anticipated K-dramas, offering Park Seo Joon a platform to redefine his on-screen persona and deliver a performance that could become a career milestone.