The WORST episodes of S Line
Every episode of S Line ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of S Line!
A young woman with the ability to see mysterious red connections between lovers discovers her secret gift is no longer unique when special glasses granting similar powers appear on the black market.
#1 - Chaos on the Horizon
Season 1 - Episode 6 - Aired 7/25/2025
Ji Uk is shaken by the shocking truth about Seon A’s S Line revealed through the glasses. As Hyeon Heup approaches her 18th birthday, she makes a pivotal decision and meets Jun Seon, plunging them into a whirlwind of chaos that threatens to unravel everything they’ve uncovered.
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#2 - Miseong Motel
Season 1 - Episode 4 - Aired 7/18/2025
Ji Uk struggles to believe Hyeon Heup’s claims about the S Line as he investigates Seon A’s case. Elsewhere, Mi Seong, a school employee with acting dreams, finds S Line glasses at Miseong Motel. Initially feeling liberated, she’s soon consumed by jealousy after seeing a woman linked to the music teacher she loves, complicating the investigation.
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#3 - A Fall into Darkness
Season 1 - Episode 3 - Aired 7/18/2025
After Seon A falls from the school rooftop and slips into a coma, Ji Uk is consumed by guilt and rage. He teams up with Hyeon Heup to find the culprit. Meanwhile, Jeong U, an English teacher at Bangju High School, discovers his fiancée’s infidelity through a pair of S Line glasses left on his desk, unraveling his life and deepening the mystery.
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#4 - The Girl with the Sunglasses
Season 1 - Episode 1 - Aired 7/11/2025
Hyeon Heup, born with the ability to see the 'S Line', a red thread revealing sexual relationships, views it as a curse. After her family suffers tragedy due to her gift, she lives in isolation to avoid causing harm. When a series of mysterious murders disrupts her neighborhood, Hyeon Heup begins using her ability to track the killer, setting her on a dangerous path.
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#5 - The Glasses
Season 1 - Episode 5 - Aired 7/25/2025
Ji Uk discovers the S Line glasses in a blood-filled bathtub at Miseong Motel, finally accepting Hyeon Heup’s truth. Using the glasses, he investigates a sexual assault case at Bangju High School, believing the person tied to Seon A’s single S Line is the key to solving her case. His pursuit intensifies as the trail grows darker.
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#6 - The Animal Kingdom
Season 1 - Episode 2 - Aired 7/11/2025
Hyeon Heup receives a cryptic text, leading her to Bangju High School, where she reunites with Seon A, her middle school classmate and Detective Ji Uk’s niece. Seon A faces relentless bullying from a school gang. As the harassment escalates, she discovers a mysterious pair of glasses in her locker, hinting at a dangerous connection to the S Line.
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