In a bustling coffee shop in the heart of a quirky city, you, a witty detective who's just had a rough day, overhear a peculiar exchange: a mysterious voice says 'hello' to someone, and chaos ensues. Is it a greeting or a grim warning? Your task is to navigate through various intriguing characters, decipher their intentions, and uncover the origins of that enigmatic salutation. Engage with patrons, gather clues, and piece together stories that intertwine in unexpected ways. Every conversation can lead to hilarious revelations or dangerous confrontations, as you race against time to uncover who said hello—and whether they're friend or foe.