Step into the shoes of Pat, an eccentric linguistics graduate who discovers a strange phenomenon: every time they greet someone, a mysterious phrase echoes back across the city, unsettling neighborhoods and unearthing secrets. As Pat journeys through the urban landscape, they must piece together the fragmented hellos to uncover their origin—are the greetings an ancient code, a lost love letter, or a sinister plot by an unknown force? Navigate through quirky characters, unexpected plot twists, and moral dilemmas, all while unraveling the truth behind the most bizarre social experiment the city's ever seen.