The Unseen Visitor is a horror story about a family that moves into an old, isolated house in the countryside. Strange events begin to occur and they begin to feel that they are being watched. The youngest daughter of the family, Lily, begins to see an invisible presence that follows her wherever she goes. At first, the family thinks it's just their imaginations, but as things progress, they realize there may be something supernatural around the house. Delving into the history of the house, they discover that it was once the home of a man suspected of practicing dark magic. They begin to suspect that his spirit has awakened and is now haunting the house. In order to discover the truth about the invisible visitor, they must face increasingly terrifying encounters. They realize that they must face it all before it is too late and become its next victims. In the end, the family learns that the only way to get rid of the invisible visitor is to make a sacrifice that will change their lives forever.