Petra von Kant is a successful but arrogant fashion designer who lives in a luxurious apartment with her silent assistant, Marlene. Following the end of a difficult marriage, Petra becomes infatuated with Karin, a beautiful and aspiring model. As Petra attempts to manipulate Karin into a relationship, she reveals her vulnerabilities and desires, showcasing a complex interplay of power and dependency. Petra's interactions with Karin expose her underlying insecurity and emotional fragility.

Throughout the narrative, Petra’s volatile emotions test her relationships with those around her, revealing the depths of her loneliness. Her obsession with Karin grows, leading to a series of confrontations and emotional breakdowns. As tensions rise, Petra's manipulative tendencies strain all her personal connections, ultimately forcing her to confront the consequences of her actions. The story portrays a compelling exploration of human desire and the destructive potential of unbalanced relationships.