The film is about the early years of famed children’s author Astrid Lindgren (Pippi Longstocking) when she experienced something that was a “combination of both miracle and calamity that came to shape her entire life.”
Carla lives life locked inside her house with her kind but tyrannical father. When their isolation is interrupted by a mysterious stranger, Carla questions the reasons for her family's withdrawal from the outside world and discovers dark secrets that redefine their existence.