In 'Hello, Who Dis?', players step into the shoes of a disgraced private investigator who receives an enigmatic text from a mysterious number. The text leads them down a rabbit hole of cryptic messages, hidden conspiracies, and intriguing characters. Players must decipher clues hidden within conversations, manage their relationships with various suspects, and navigate a spiraling story where every interaction could be a breakthrough or a trap. The choices made will drastically change the outcome, leading to multiple possible endings as secrets unfold.