I found this far more watchable than most others seem to have.
A farmer inspects a noise in his barn, which we can see came from a doll. He encounters a killer with a pitchfork. The scene following seems to have a family commenting on the death, suggesting the guy turned out OK. However, it turns out they were talking about something else, as the killer stumbles in - and the family is committed to hiding the crime.
A young man traveling to California stops in the town, and meets a young woman by her family's pond. They take a liking to each other, and she invites him to stay. Unfortunately, they're the family from the opening scene.
She claims to be a witch, and he's skeptical. She claims also to be possessed by the devil, but this seems to refer more to ownership than the devil actually being inside her controlling her actions.
The movie is slow, but has a nice 70s flavor, and a bucolic farm setting. For the gorehounds, there's the opening pitchfork scene (not terribly gory), and a much bloodier kill with a hook used for handling hay bales. There's a flashback to 100+ years ago of the punishment of a witch. The ending is perfect.
