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S Line

Hyeon-heup has been able to see the mysterious 'S lines' since birth, a secret only she could perceive. But when special glasses allow others to see it too, long-buried secrets and hidden connections surface, pulling her into a web of desire, betrayal, and dangerous truths in this haunting thriller.

IMDb 6.36 episodes2025HDU/A 16+

Drama•Fantasy•Suspense

Play Season 1 Episode 1

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Included with Prime

Korean

Episode Related Details

S1 E1 - S Line

July 11, 2025 • 46m•U/A 16+

Hyeon-heup, born with the ability to see the 'S lines' that reveal people's sexual connections, faces deep personal tragedy due to her power. Isolated by its consequences, she withdraws from the world and lives in solitude for years, until strange events make her return to society.

Included with Prime

S1 E2 - S Line

July 11, 2025 • 46m•U/A 16+

Hyeon-heup enrolls in Bangju High School after getting a strange text. There, she unexpectedly reunites with Seon-ah, a former classmate from middle school and the niece of Ji-wook.

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S1 E3 - S Line

July 18, 2025 • 52m•U/A 16+

After a rooftop incident leaves Seon-ah in a coma, Ji-wook teams up with Hyeon-heup to uncover the truth, driven by guilt. Meanwhile, teacher Jung-woo ends his engagement after catching his fiancée cheating, only to discover a mysterious pair of glasses on his desk.

Included with Prime

S1 E4 - S Line

July 18, 2025 • 50m•U/A 16+

Ji-wook investigates Seon-ah’s case but doubts Hyeon-heup’s theory about the S line. School secretary Mi-seong stumbles upon the infamous glasses - only to be consumed by jealousy when she notices another woman tied to the man she secretly admires.

Included with Prime

S1 E5 - S Line

July 25, 2025 • 50m•U/A 16+

Ji-wook discovers a pair of glasses in a bloodstained bathtub, validating Hyun-heup’s story. With the glasses, he begins probing sexual assault cases and suspects that someone connected to Seon-ah's S line may be responsible for what happened to her.

Included with Prime

S1 E6 - S Line

July 25, 2025 • 46m•U/A 16+

The mystery of the S lines comes to a dramatic conclusion as loyalties crumble and unexpected truths surface. Hyeon-heup must confront choices that will change lives forever, along with the consequences of seeing and being seen in ways never imagined.

Included with Prime