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tvN's new weekend series Unknown Seoul is set to premiere on Saturday, May 24, 2025, at 9:20 pm KST, delivering a fresh blend of romance, self-discovery, and emotional complexity.
The drama is written by Lee Kang (Youth of May) and directed by Park Shin-woo, known for hits like It's Okay to Not Be Okay and Jealousy Incarnate. Starring starring Park Bo-young, Park Jin-young, and Ryu Kyung-soo, the series is backed by Studio Dragon, Monster Union, and High Ground.
Release schedule of Unknown Seoul
Unknown Seoul premieres May 24, 2025, and will air every Saturday and Sunday at 9:20 pm KST on tvN. The complete release schedule is noted below.
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Unknown Seoul: Plot and cast
The plot of Unknown Seoul follows twin sisters Yu Mi-ji and Yu Mi-rae. Even though they look alike, they are very different people in terms of lifestyle choices and personalities. Yet, when one of the sisters tells a lie, the girls have to switch places, and the audience is introduced to truths, regret, and ultimately love and healing against the adventurous, spinning location of Seoul.
The younger sister, Yu Mi-ji, was once the top athlete in performance sport. However, her rise to stardom was cut short and she entered an easy-going, laid-back lifestyle. In complete contrast, the elder twin, Yu Mi-rae, has remained buttoned-down with her life choices.
She has continuously maintained impeccable integrity with her pursuit of academic excellence and as a hard-working employee of a public corporation. The twins decide to change things up and trade their lives with each other.
Unknown Seoul dives into the consequences of this identity switch: navigating careers, relationships, and emotions that don’t quite belong to them. Through this journey, both sisters face their past traumas and present dilemmas, gradually discovering who they are and what truly matters.
In the lead is Park Bo-young, who plays the twin role of Mi-ji and Mi-rae. This is Bo-young's first time portraying twin roles as well, and her first time transforming herself with blonde hair. Supporting Park Bo-young is Park Jin-young as Lee Ho-soo, a high-powered lawyer with a put-together, calm, sophisticated image on the outside but is plagued by emotional trauma on the inside.
Park Jin-young's Lee Ho-soo leads a quiet life, but a chance meeting will upend his carefully cocooned heart and expose him to unexpected feelings and challenges. Lee Ho-soo is far from the standard romantic lead, someone whose "normal" life is just enough to be normal after having lived through an unspecified event that altered his life.
More about the cast
Park Bo-young gained recognition with her role in Scandal Makers and solidified her popularity through A Werewolf Boy. She is also known for leading roles in dramas like Oh My Ghost, where she played a shy assistant chef possessed by a ghost, and Strong Woman Do Bong-soon, portraying a woman with superhuman strength. More recent projects include Daily Dose of Sunshine, Light Shop, and Melo Movie.
Park Jin-young began his acting career with Dream High 2 and gained recognition through He Is Psychometric, portraying a young man with psychometric abilities. He further showcased his range in When My Love Blooms, Yumi’s Cells, and the legal drama The Devil Judge. He made his film debut with A Christmas Carol, playing dual roles. He was recently seen in The Witch.
Unknown Seoul is scheduled to be released on May 24 this year.
