냉혈한 범죄 심리학자이자 교수 마데레사, 순수한 얼굴 뒤에 비밀을 감춘 조교 박설, 두 사람을 지켜보는 검사 유아람.

세간의 이목이 쏠린 미제 살인 사건들을 파헤치며, 숨겨졌던 진실과 뜻밖의 감정을 마주하게 되는 이야기. 넷플릭스 시리즈 <마데레사>, 나나, 김단, 정건주 캐스팅 확정. pic.twitter.com/tjPXy21p2o

— Netflix Korea｜넷플릭스 코리아 (@NetflixKR) September 1, 2026

Netflix Confirms Production and Cast of 'Materesa' (WT) by 'Queen of Tears' Director and 'The East Palace' Writers

Netflix has confirmed the production and cast of its new Korean series Materesa (WT), a story about a cold-blooded criminal psychologist and professor named Ma Teresa (NANA), who investigates unsolved murder cases. She's joined by her assistant Park Seol (Kim Dan), whose innocent looks hide a secret, and her long-time friend and prosecutor Yoo A-ram (Jung Gun-joo), as the three come to confront long-hidden truths and emotions.

When Ma Teresa is asked to consult on high-profile cold-case murder investigations, her assistant, Park Seol, is eager to help, craving her attention. Meanwhile, Yoo A-ram is wary of Park Seol lingering by Teresa's side. As Ma Teresa interrogates criminals to uncover clues and comes closer to the long-desired truth, she finds herself swept up in unexpected emotions.

Materesa (WT) is directed by Jang Young-woo (Queen of Tears, Bulgasal: Immortal Souls) and written by Kwon So-ra and Seo Jea-won (The East Palace). Together, they weave a thriller around cold murder cases with subtle and intensifying emotions between the characters.

NANA (Mask Girl, Glitch) takes on the role of Ma Teresa, bringing both her character's hardened exterior and her complex inner turmoil to life as she investigates cold-case murders while carrying old trauma. Rising star Kim Dan (The Winning Try) plays her assistant, Park Seol, whose easy smile hides a secret and an unpredictable edge. Jung Gun-joo (Mercy for None) stars as prosecutor Yoo A-ram, Ma Teresa's long-time friend, bringing quiet depth to the tangled relationships at the story's center.

Materesa (WT) will present a novel story that delves into high-profile cold-case murders as the characters inch toward the truth - and toward each other - only on Netflix.

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Title Information

Title: Materesa (Working Title)

Directed by: Jang Young-woo

Written by: Kwon So-ra, Seo Jea-won

Cast: NANA, Kim Dan, Jung Gun-joo

Produced by: SHOWRUNNERS

Presented by: Netflix