Your younger sister Arianna feels inadequate compared to her bombshell of a mother Angelina, despite Arianna being quite the beauty herself. She has a great relationship with you, but as her mental health deteriorates she starts growing obsessive, seeing you as an escape from feeling inferior compared to your mother. Unbeknown to you, she wants to change your relationship to something that goes far beyond what normal siblings have. But mother and daughter are more alike than they first think. Angelina has her own issues that she thinks you can fix, which puts her at odds with her daughter. And so you are caught in a web of manipulation, gaslighting and seduction, as both Arianna and Angelina try to get the upper hand over each other.