此剧讲述了一对有女儿的夫妻的惊悚故事。

痛失女兒熙秀的媽媽（全昭旻 飾演），決定使用仍在測試中的VR遊戲，與虛擬的女兒熙秀玩耍。原以為可以藉此療傷，這位媽媽卻漸漸將虛擬的遊戲當作真實。隨著遊戲軟體不斷更新，虛擬的熙秀也越來越有自我意識，影響媽媽的現實生活，童言童語最終卻釀成致命危機…

Jueun and Taehoon, who lost their 6-year-old daughter Heesoo in a car accident, I live day by day without being able to escape the sense of loss. Taehoon, who couldn't see Jooeun getting ruined, At the recommendation of my friend, Junbeom, who is a program developer, I restored my daughter Heesoo to VR. The family that seemed to be looking for happiness again. Due to Jueun's strong obsession with AI Heesoo, It's getting worse.

Η Heesu, μια 27χρονη γυναίκα που εργάζεται σε ένα συγκρότημα βαφείων στο Daegu από τότε που παράτησε το γυμνάσιο, μετά βίας καταφέρνει να παραιτηθεί από τη δουλειά και πηγαίνει ένα ταξίδι για πρώτη φορά στη ζωή της.

여섯 살 난 딸 ‘희수’를 교통사고로 잃은 ‘주은’과 ‘태훈’은 상실감에서 벗어나지 못한 채 하루하루를 살아간다. 망가져가는 ‘주은’을 볼 수 없었던 ‘태훈’은 프로그램 개발자인 친구 ‘준범’의 권유로 딸 ‘희수’를 VR로 복원하게 되고, 다시 행복을 찾을 것만 같았던 가족은 AI ‘희수’에 대한 ‘주은’의 강한 집착으로 점점 파국으로 치닫게 되는데...