All the Kind Strangers (1974)

Plot

A photographer from Los Angeles finds himself in a chilling situation while driving through a remote area. When he picks up a young boy wandering alone, it seems like a simple act of kindness. However, upon arriving at the boy’s secluded home, he uncovers a sinister secret: the children are holding a woman captive, treating her as their "mother." Now, he is thrust into a terrifying role as their "father," with dire consequences if he refuses to comply. Tension escalates as he grapples with the chilling dynamics of this fractured family.