When his family is terrorised by the ghost of a killer, a man sets out to confront the ghost, an old foe, bent on avenging his death.

I like this one. Reminds me of 'Cape Fear' but with a ghost twist. Also 'Shocker', that Wes Craven's 80's B-movie about a serial killer's spirit using electric power to kill.

I imagine being a ghost gives the killer a couple of advantages (invisibility, teleportation, and so on). I'd like to see what kind of things the family man would do to stop him.

But is the ghost only looking for vengeance? Maybe the family man did something horrible to him and kept it in secret. That would put him in jeopardy with his family also. I don't know, maybe the ghost was a business associate and got betrayed and killed by the family man to get his share of the company. I think the lead character's contradiction would add depth to him and the story as a whole.

Wow! Personally I don't watch horror but if something less scary then I'd watch it for sure.