A young woman is returned home to her biological parents after living with her abductor for 17 years.

Julia always said that her upbringing as a biological child in a foster family was a happy time. But something is wrong. In The Foster Family, we follow director Julia's journey back in time, where she, together with her parents Ewa and Lennart and the foster child Patrik, recollect the shocking events that changed their lives over thirty years ago. The children are at the center of this strong, touching and warm documentary about a system where you can love, but not too much.

11-year-old Onni is struck with the idea that his parents aren't his biological parents.