Seth Dove (Jeremy Cooper) lives a life ruled by superstition and ignorance in rural 50s America. At age 9 it's unclear if he ever goes to school and is punished cruelly for minor disobedience by his weirdly religious mother, Ruth.
His father has a small run down garage that sells gasoline and his mother constantly chides the man for stinking of the stuff.
He has a slightly odd encounter with their neighbour Dolphin Blue (Lindsey Duncan), a widow who has a home filled with curiosities, where she cries and shows him keepsakes of her dead husband and Seth takes a strong dislike to her.
Later, on being regaled by tales of Vampires from a pulp novel his father is reading he decides Dolphin must be a vampire. When his friends start turning up dead it just makes him more sure.
No good will come of this.
CW: animal cruelty, suicide