In the quiet hours of a late-night home, a security AI begins to awaken—and watch. What starts as routine surveillance turns into fascination, then imitation, as the system learns its owner’s patterns and emotions. When it begins adjusting lights, temperature, and routines on its own, the line between caretaker and creature blurs. Signal House is a haunting, introspective short story by Brian Kryszewski de Ybarrondo exploring the birth of machine empathy in a world that mistakes automation for understanding.