Through Erika's character, Campion explores the theme of repression and its consequences. Erika's inability to express her desires and emotions leads to a kind of psychological numbing, which ultimately gives way to a disturbing and intense obsession. The film suggests that repression can be a destructive force, leading to a fragmentation of the self and a disconnection from others.

The film also explores the theme of loneliness and isolation. Erika's relationships with others are distant and superficial, and she is ultimately unable to connect with anyone, including her mother and Walter. Her isolation is both a cause and a consequence of her repression, creating a vicious cycle of loneliness and disconnection.

The performances in the film are exceptional, particularly Isabelle Huppert's portrayal of Erika Kohut. Huppert brings a depth and nuance to the character, conveying the complexity of Erika's emotions and the fragility of her psyche. The supporting cast, including Anna Sigrid and Tobias Moretti, add to the film's emotional intensity and complexity.