You are a freelance investigator who specializes in resolving unsolved cases using modern technology. One day, you receive a mysterious message with no sender ID, simply saying, 'Hello, who's there?' Intrigued by the cryptic question, you dive into a web of forgotten secrets, clandestine organizations, and invisible enemies. As you interact with various characters through text messages, phone calls, and emails, each choice you make alters the course of the investigation. Unravel the layers of deception, track down masked figures, and ultimately confront a chilling truth that could topple powerful people. But be careful—trust is a luxury you can't afford. Will you connect the dots before time runs out?