'Demons from Her Past' isn't actually that terrible, but the poor acting and dumb character behaviour hampers everything else down.
The premise is more than decent, but the way the characters are portrayed just doesn't make sense a lot of the time - they have an annoying knack of explaining their plans straight to their enemies in private settings, before reacting with shock that it led to bad things for them.
The acting doesn't help either, with none of the cast giving anything memorable. I didn't connect with the supposed protagonist, Alison (Alexandra Paul), all that much, despite the obvious nature of the antagonists. Another negative is the music, which isn't bad but it's definitely overused; it felt like every scene needlessly had a dramatic score behind it.
Not an awful film, just not a good one at all. The concept did hold potential, though.