Katherine Beasley has gone through her entire life hearing odd knocks coming from the inside of her wall, misplacing objects and finding them in unexpected places, and hearing whispers when she's alone. Basically all of the ghost-story, urban legend-type tales that happen in the movies when people move into new houses.
Only, she's lived in the same house her parents built when she was a baby. No one has ever died in it, so why would there be ghosts?
That is the logic of her parents, who always tell her that everything she sees, everything she hears is completely imaginary.
But when horrible things beyond any of their imaginings begin, Katherine isn't sure that it's all in her head anymore.
Suddenly, all of the members of her family find themselves held inside of their home by force, experiencing more horrors than they ever could've imagined.
It's up to Katherine to find out exactly what's going on, and fast, before the "imaginary" being tears them apart.