In 'Hello, Who Dis?', players assume the role of Riley, an ordinary person whose life takes a dark turn when they begin receiving mysterious calls from a number that doesn’t exist. Each conversation pulls Riley deeper into a surreal world of dark secrets, bizarre characters, and a hidden conspiracy. As players navigate through various paths based on their choices, they must use logic and empathy to unravel the truth behind these calls while questioning their own sanity. The fate of Riley and their loved ones hinges on every decision made, leading to multiple endings that explore themes of trust, reality, and identity.