Dear Child (2023) is a German thriller (Netflix) based on a novel of the same name by Romy Hausmann.

A 13-year-old missing persons case is reopened when a mysterious woman is struck by a car in a German forest one night.

We find out the woman was kidnapped months previously and taken to a window-less house to care for 2 children. The 3 are imprisoned by a man the children call Poppa.

Poppa was raised in kinship care by his grandparents.