"After a twisted psychopath is murdered, an evil entity targets the current lineage of those responsible to husk, and kill them to sate his revenge."
I would recommend doing away with the old english "sate"- satisfy, satiate, fulfilled, cloy, content, pall, quench...
I'm not sure the fact that the victims being kin to the original killers is necessary for the log. The "hook", I think, is the method of the killing- the husking of the victim's skin. Since it is the hook (IMO) I would highlight that.
The ancestral part of the story will envelope as the story is told. If it takes place in Kansas or some mid-west town, it will be more shocking and also ironic, due to the nature of harvesting corn, their main crop. I added "alive" to make it that much more horrific. I certainly hope it IS a horror concept, and not a comedy...
"A (adjective- unwitting Kansas?) farmgirl is hunted by the spirit of a tortured criminal, who seeks revenge by "husking" the skin of his victims- alive."
Good luck with the project. Sounds like fun and games :)