Deep in Greenland's frozen expanse, the group's survival hangs by a thread. Moritz wants to protect Smilla, while she and Tork confront a chilling truth: that only one of them will survive the journey into the unknown.

Loyalties are tested and hidden alliances are shifted as Smilla's secret mission unfolds at sea, and a startling truth threatens to shake up everything aboard the expedition.

Framed for a crime, Smilla goes on the run with help but soon faces betrayal and lost secrets; a shadowy leader takes charge, setting the stage for a dangerous mission.

Hidden clues lead Smilla toward a secret buried in Greenland; as alliances shift, suspicions deepen, and unseen threats emerge, Smilla must navigate a web of mystery where nothing is as it seems.

An ambitious entrepreneur and a right-wing politician form an unlikely partnership; Smilla grows closer to her neighbour, who was responsible for taking Isaiah to his regular hospital visits, and who also wants to uncover the truth. 

Smilla's young neighbour, an Inuit boy, tragically dies in a fall. Police quickly dismiss the case, but she doesn't believe it was an accident. She begins her own investigation, clashing with a police officer and Denmark's leading energy supplier.