Megan's the perfect daughter Yoonchae's parents always wanted, but never actually had. Now, Yoonchae has to live with her, and try not to fall for her.

How well do you really know the people in your blind spots? Behind the floor-to-ceiling glass of her modern apartment, Yoonchae's life appears picture-perfect. But glass works both ways-and across the street, Megan Skiendiel is watching. As a high-level IT Security Lead, Megan doesn't just observe; she infiltrates. She has cloned Yoonchae's phone, bypassed her home security, and mapped every detail of her daily routine. To Yoonchae, Megan is merely the comforting stranger who helped clean up a chaotic matcha spill on the street. To Megan, Yoonchae is a puzzle she has already solved. Step by step, the invisible walls close in. When belongings move on their own and her digital life glitches, Yoonchae falls into a suffocating spiral of paranoia, convincing herself she is losing her mind. Isolating her from her friends and dismantling her sanity piece by piece, Megan carefully orchestrates Yoonchae's total breakdown-waiting for the moment Yoonchae comes begging at her door for help. Desperate for a safe haven, Yoonchae runs straight into the arms of her protector, unaware she is stepping directly into the predator's cage. Told in dual perspectives, this dark, high-stakes psychological thriller explores the terrifying line between digital surveillance, gaslighting, and unhinged obsession. Yoonchae is walking blindly into a masterfully constructed trap-until one tiny mistake shatters the illusion, forces the mask to slip, and turns a game of psychological control into a brutal fight for survival. TRIGGER WARNINGS; - Explicit Sexual Content - Abuse and Child Abuse - Physical Violence - Murder - Suicide - Self Harm - Sexual Assault