Whose Hellos Are These, Anyway?

You are a detective in a ravaged city where public greetings—simple hellos—turn deadly at random. Each time someone nonchalantly says 'hello', a twist of fate befalls the unsuspecting citizen. Investigate a series of bizarre incidents caused by these peculiar hellos while interacting with quirky suspects, deciphering dramatic plot twists, and piecing together the riddles of an ancient cursed greeting card. Your wit is your ultimate weapon in solving this dark enigma before the next 'hello' spells doom for the entire city.