The crime scene is as puzzling as it is brutal. Doctor Paul Latham and his wife, Brindel, are found dead in separate beds in their beautiful San Francisco home, each the victim of a gunshot wound to the head. There are no signs of forced entry, and despite the emptied safe it's clear this murder isn't random. For Detective Regan Pescoli, news of her sister's death brings grief mixed with guilt. She and Brindel weren't close, and Pescoli barely knows...

Struggling with traumatic memories of the shooting accident that ended her half-brother's life twenty years earlier, Rachael prepares for her high school reunion and begins to doubt her sanity when things in her home start moving by themselves.