In a post-apocalyptic city where human interaction is as rare as the sunlight, you play as a quirky private investigator who receives mysterious voice messages from anonymous strangers. Each message contains a greeting—an unfamiliar 'hello' with a hidden puzzle or clue. As you decode these hellos, you uncover a conspiracy that connects the city's remaining inhabitants, involving forgotten pasts, hidden identities, and a plot to reclaim humanity’s lost connections. Explore branching narratives, build relationships based on choices, and discover that every 'hello' has a story—and a secret. But beware, the closer you get to the truth, the more hellos you receive from those who would prefer you remain confused.