Nightmare: Squid Game’s Lee You-mi Returns to Netflix in a Show That Punishes You in Your Sleep

Forget prison cells — in Netflix’s next big K-drama, justice happens inside your dreams. Nightmare, a new sci-fi crime thriller from SBS, is heading to Netflix in April 2027, and the premise alone is enough to make you double-check your bedroom door tonight.

Leading the cast is Lee You-mi, the actress who became a global name after Squid Game, alongside Song of the Bandits star Kim Nam-gil. Together they play detectives caught inside a justice system that doesn’t just lock criminals up — it traps their minds in nightmares they can never wake up from.

Nightmare: Key Details

A Premise Built on Fear as Justice

The show’s world is unsettling by design: when criminals slip through the legal system, AI technology drags them into their own subconscious, weaponizing their deepest fears as punishment. Kim Nam-gil plays Detective Kim Tae-i, a sharp investigator from the Violent Crimes Unit who uncovers a much bigger conspiracy behind the technology as he digs deeper.

Lee You-mi’s character, Detective Jang Gyu-eun, adds an even darker layer — outwardly a quiet victim specialist, she secretly moonlights as a “nightmare architect,” the very person shaping the punishments criminals endure. It’s a fascinating double-life setup that could make her the most compelling part of the entire series.

With two proven Netflix leads and a director who knows how to build tension episode to episode, Nightmare looks positioned to be one of 2027’s early must-watch K-dramas.

For more K-drama casting news, premiere dates, and first-look breakdowns, check out the entertainment coverage on TechnoSports.

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