In 'Hello, Who?', you take on the role of a once-renowned detective who has lost their flair for solving cases. When a string of mysterious letters begins appearing in your mailbox, each containing riddles and clues, you find yourself drawn back into the world of enigmas. Each letter seems to be from a shadowy figure called 'Hello', who challenges you to uncover secrets from your past, all while revealing the truth about a clandestine society that connects your life to the mysteries of the city. Engage with a cast of quirky characters, make pivotal choices that shape the narrative, and unravel a web of intrigue that binds you to the very source of your own stagnation.