After sitting alone for hours, I heard a strange mechanical hum coming from Nathan’s locked study. Suddenly, a hidden screen on the wall activated, showing a recording of my late husband. He explained that he had installed a security system after receiving threats he had never told me about. The system was connected to emergency services and had been programmed to activate if he failed to return and deactivate it.

Nathan warned me not to open the front door for anyone and revealed that the police were already on their way. At that exact moment, someone began violently pounding on the front door, shouting his name. I backed away as the security system automatically contacted the authorities and began recording the intruder.

Within minutes, police arrived and arrested the man on the porch. I later discovered that he was Nathan’s former business partner, whom Nathan had secretly investigated for embezzling company funds. The man had been watching the house and waiting for me to be alone.