Season 4 of House of the Dragon premiered on January 1, 2025.

Nina Kautsalo returns to Ivalo, where she starts investigating the murder of a local pharmacist as chief of police. Meanwhile, an attempt is made to hijack a top-secret test car. Soon the murder investigation led by Nina also points in the direction of the international car business.

Nina Kautsalo has moved to Rovaniemi in northern Finland, where her daughter has started special school and her mother is undergoing cancer treatment. Nina joins a new Finnish-Russian police team and is partnered with the mysterious Viktor. A new investigation leads them to Murmansk on the trail of a mysterious hunting club. The case also involves an unsolved old murder whose prime suspect has disappeared.

Season 1 of House of the Dragon premiered on December 21, 2018.