In 'Call of the Unknown', you are a reluctant private investigator who receives a strange phone call from a number that no one seems to recognize. This mysterious caller leads you into a web of conspiracy involving a shadowy organization that manipulates communication technology. As you unravel clues through a series of interactive text messages, phone calls, and hidden digital breadcrumbs, you'll have to decide who to trust and where to go next. Each decision alters the story, branching into dangerous encounters, surprising allies, and unexpected twists that could cost you your life—or your sanity. The key question remains: who is really on the other end of that line?