Ensconced in her sprawling San Jose, California mansion, eccentric firearm heiress Sarah Winchester (Dame Helen Mirren) believes she is haunted by the souls of people killed by the Winchester repeating rifle.
Bodies are turning up around the city, each having met a uniquely gruesome demise. As the investigation proceeds, evidence points to one suspect: John Kramer, the man known as Jigsaw, who has been dead for over 10 years.