Xico is a child who was born with a neurological disease which deteriorated his motor functions since birth. His life was saved by interfacing his brain to an AI, becoming a quasi-human. In an attempt to experience life as a real person, Xico dives into the first videogames for quasi-humans. There he meets Ally, a psychopath boy with whose AI confers him artificial empathy. Their friendship grows as they play together through many digital universes. But, within these worlds of wonders, they must also face their real-life monsters.