When a young boy falls from a Copenhagen rooftop, Smilla Jaspersen rejects the official verdict of an accident and initiates a private investigation into the truth. Smilla, a woman of Greenlandic and Danish heritage, utilizes her unique expertise in glaciology to interpret the physical evidence left in the snow. Her search for justice pits her against powerful institutional forces that seek to suppress the circumstances of the boy's death. The narrative unfolds through a first-person perspective, blending cold, clinical observation with the protagonist's internal struggle regarding her identity and displacement.

This novel is widely regarded as a foundational work of the Scandinavian noir genre, praised for its intellectual depth and atmospheric tension. Critics often highlight the protagonist's singular voice and the author's ability to weave complex scientific knowledge into a compelling mystery framework. Readers frequently note the stark contrast between the urban setting of Denmark and the desolate, dangerous beauty of the Arctic landscape. The work remains a significant point of reference for its exploration of cultural alienation and the cold, precise nature of its investigative plot.