In 'Hello, Who's Calling?', you take on the role of a disgraced detective turned private investigator, who receives a mysterious phone call while taking a nostalgic stroll through the city. Each call reveals hidden truths, complex conspiracies, and quirky characters you must navigate to uncover a web of deceit tied to an unsolved case from your past. As you engage in humorous dialogues and make critical choices, every decision influences the unfolding drama, leading to multiple endings based on your ability to connect the dots and solve the mystery before time runs out.