As S Line enters its final week, episodes 5 and 6 are poised to deliver dramatic twists, long-awaited revelations, and emotional closure. The dark fantasy-thriller has kept viewers on edge with its chilling premise: mysterious red “S Lines” that expose people’s sexual histories—and the chaos they unleash when misused.
Episodes 1–4 Recap: Power, Misuse, and a Violent Fall
The story began with Sin Hyeon Hop (played by Arin), a seemingly ordinary high school girl who can see red lines above people’s heads—visual markers of their sexual past. Initially using her power to discreetly help others, her world is upended when fellow student Kang Seon A (Lee Eun Saem) acquires a pair of enchanted spectacles that grant her the same vision.
Unlike Hyeon Hop, Seon A exploits the glasses. After discovering a disturbing affair between a teacher and her own bully, she tries to blackmail them. But before she can act, she is violently pushed off the school rooftop, leaving her comatose. Hyeon Hop witnesses the fall, marking a turning point in the story.
Enter Han Ji Wook (Lee Soo Hyuk), Seon A’s uncle and a police officer, who begins investigating the attempted murder. In the process, he acquires the spectacles himself, learning firsthand how deeply they can impact an investigation.
Meanwhile, another pair of glasses finds its way into the hands of a male teacher at Seon A’s school. The power proves just as destructive, leading him to uncover infidelity in both his personal and family life, exposing a wider ripple effect the glasses have on people’s decisions.
Episodes 5–6 Preview: Confronting Trauma and Unmasking the Attacker
As the finale approaches, Ji Wook takes on a sensitive new case involving a rape victim who refuses to acknowledge her trauma. The S Line above her head may be the only clue he has to identify her assailant. Using the glasses, he must walk a fine line between protecting the victim’s privacy and pursuing justice. The narrative here promises emotional depth and moral complexity, highlighting how the supernatural intersects with real-world issues.
In parallel, Ji Wook begins to suspect his niece’s homeroom teacher, Lee Gyu Jin (played by Lee Da Hee), of having a deeper link to the mysterious spectacles. Her behavior and hidden past may hold key answers about where the glasses came from—and who might be distributing them.
Above all, the most pressing mystery remains: Who pushed Kang Seon A off the rooftop, and why? As the final episodes unfold, viewers can expect an intense blend of psychological drama, investigative suspense, and perhaps a last-minute twist that reframes everything.
When and Where to Watch
Episodes 5 and 6 of S Line premiere on July 25 at 11:00 AM KST on Wavve. International viewers can tune in at 7:30 AM IST / 10:00 PM ET (July 24). With only two episodes left, the tension is at its peak—and the truth is finally within reach.
