Upon arriving at university, Sara, a young woman full of dreams and expectations, feels excited to start a new life away from home. Everything seems perfect when she is assigned Rebecca as her roommate; a charming, attractive, and somewhat mysterious girl. At first, their friendship blossoms. However, things soon take a dark turn as Sara begins to discover that Rebecca's personality is more complex than it appears.
As they delve into university life, Rebecca's obsession with Sara grows increasingly dangerous. From controlling who she hangs out with to creating unnecessary conflicts, their living situation transforms into a nightmare. Sara, torn between confronting Rebecca or distancing herself, feels trapped in a web of manipulation and jealousy.
The situation unravels when Sara falls in love with a guy from her class, provoking Rebecca's anger and resentment. Events escalate rapidly toward a violent climax, and Sara realizes that her life is in danger. What started as a simple friendship turns into a struggle for survival. Will Sara be able to free herself from the shadow of her roommate before it's too late? With unexpected twists and constant tension, the story explores the limits of friendship and paranoia in the highly competitive environment of university life.