Paul and Jennifer Hemdale have just moved into their dream house. But their happy marriage is about to be put to the test as they slowly discover the secret behind the black room in the cellar. Something else is already living in their new home and it is growing stronger every day.

After a fatal accident occurs, Nathan Perry is assigned to the Milwood facility for young adults. During his time at Milwood, Nathan becomes a victim of unforeseen terror and unusual behavior.