Premiere
11
Jul2025
Studio
About
Synopsis
S Line (S라인, 2025) is a Korean fantasy drama series you can watch online on iFILM, directed by Ahn Ju-young and starring Lee Soo-hyuk and Choi Ye-won.
A glowing red thread — the so-called S Line — appears above anyone who has been intimate with someone else. Most people can't see it. One young woman has always been able to, and has kept the ability to herself. That changes when glasses offering the same power start circulating on the black market.
The series blends detective plotting with social science fiction: the hidden ties between people become literal rather than symbolic, and the consequences are hard to contain. Stream all episodes of S Line (2025) online on iFILM.
Series
All seasons
Cast
Starring
Lee Soo-hyuk
Han Ji-wook
ARIN
Shin Hyeon-heup
Lee Da-hee
Lee Gyu-jin
Lee Eun-saem
Kang Seon-ah
Kim Dong-young
Oh Dong-sik
Lee Gwang-hee
Joon-seon
Lee Han-joo
Yoon Ji-na
Woo Ji-hyun
Jung-woo
Nam Kyu-hee
Kim Hye-yeong
Oh Woo-ri
Lee Kyung-jin
Oh Seung-jun
Lee Ji-won
Kim So-young
Choi I-seo
Park Seong-il
Bang Seong-jin
Lee Ga-sub
Oh Jung-min
Park Ye-ni
Hee-won
Jeong Jae-kwang
Bartender
Jang Sun
Hyeon-heup's Mother
Ahn Joo-Young
crew
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