In Ancestral Curse (The Darkness), a family organizes a vacation to the Grand Canyon of the Colorado, an impressive area that many families of the United States visit, since not every day one has the possibility to see such a spectacle.
This family is numerous, so they have a good time. What happens is that unknowingly they take something with them, a kind of supernatural entity that sticks to them and goes with the family.
When the family reaches home, that entity begins to manifest itself. The more scared the better for this being, since it feeds on the fear of the people, so that little by little it becomes more powerful.
That will allow him to destroy the family, little by little and member to member, so if what is left of the family does not make a common front soon there will be nobody alive to tell what happened to them.