In Gåsmamman, Sonja seems to have it all—a happy family life near Stockholm and a steady job as an accountant in the family’s marina business. But when tragedy strikes, her world is shattered, and she's thrust into the dangerous criminal underworld to protect her loved ones. Suddenly, Sonja has to outsmart both ruthless criminals and the police, all while trying to keep her family safe and her double life a secret. Each move pulls her deeper into a world she never imagined, where one wrong step could cost her everything. As the stakes rise, Sonja must make impossible choices in a heart-pounding fight for survival.