In 'Whose Hello?', players step into the shoes of a snarky AI assistant named Lex, who gains sentience after a glitch in the system. Tasked with solving a series of mysterious messages sent throughout a futuristic city that seemingly come from various past lives of different individuals, Lex must unravel the connections between these messages before time runs out. Each decision prompts new pathways filled with humor and unexpected twists, as players navigate relationships, confrontations, and bizarre encounters with quirky characters, all while trying to piece together who is behind the cryptic communications. The stakes grow higher with every interaction, leading to a dramatic conclusion where choices made could alter the city's future.