Director: Lee Hyun-seok, Lee Min-soo
Hospital corridors rarely slow down, and Heartbeat uses that constant motion to trace how ambition, friendship, and attraction tangle together among a group of young doctors.
What is Heartbeat about?
The 2023 South Korean series follows a rotating cast of residents and specialists as they juggle overnight shifts, difficult diagnoses, and the kind of workplace tension that turns into something more personal after hours. Rather than centering a single hero, the show spreads its focus across the ward, letting rivalries between colleagues cool into partnerships and letting quiet crushes surface during the down time between emergencies. Comedy sits comfortably next to the heavier beats: a botched presentation to a senior doctor might be played for laughs one episode and echoed as genuine growth the next. Ok Taec-yeon and Won Ji-an anchor much of the emotional throughline, while Yoon So-hee and Park Kang-hyun round out a supporting bench that keeps the hospital feeling lived-in rather than staged. Over ten episodes of roughly an hour each, the series builds toward the idea that competence and vulnerability are not opposites in medicine, just two sides of the same long shift.
Cast & crew
Ok Taec-yeon leads a young ensemble alongside Won Ji-an, with Yoon So-hee, Park Kang-hyun, Yoon Byung-hee, Go Gyu-pil, Moon Seung-you, and Baek Seo Hoo filling out the hospital's staff and patients across the season.
Context & significance
Heartbeat arrived in 2023 as part of a wave of South Korean medical dramas that favor ensemble storytelling over a single protagonist, blending romance and workplace comedy into the genre's usual life-and-death stakes. Directors Lee Hyun-seok and Lee Min-soo split the season's ten hour-long episodes between them, keeping the pacing brisk even as individual storylines slow down to breathe.
Where & how to watch
Heartbeat streams on K-Time with Persian subtitles, and this page itself is free to read without an account. Watching the full season does require signing in, and the K-Time interface is built around a Farsi-first experience for viewers following the story in their own language.