After the disturbing events that Katie experienced, her sister Kristi and her family try to lead a quiet life in their new home, unaware that the shadows of the past have not faded. The story focuses on Kristi's family, which includes her husband Dan, their six-month-old daughter, their teenage son, and the babysitter who cares for the little one. Everything seems normal until inexplicable incidents begin to occur in the home: doors opening on their own, objects moving without apparent reason, and whispers that seem to emerge from the darkness.
In search of answers, Dan decides to install security cameras throughout the house. However, as the phenomena intensify, the family feels increasingly invaded by a malevolent presence. The footage captured reveals a series of terrifying events that expose this force's connection to the family's dark background and, in particular, to Kristi, who starts to remember details of a past she thought she had forgotten.
With each passing day, the situation becomes more distressing and dangerous. Tensions rise, and the family finds themselves trapped in a sinister game that seems to have no end. As they struggle to uncover the truth behind the entity that haunts them, they must confront the harsh reality that there may be something much more disturbing than an enemy in the darkness; it could be a familial bond they never imagined.