"Sword Art Online: Alicization" is the third season of the popular anime series Sword Art Online. It follows the story of Kirito, who finds himself in a mysterious virtual world called Underworld. In this world, he meets a young boy named Eugeo and together they embark on a quest to save a girl named Alice while uncovering the secrets of the realm. The series explores themes of artificial intelligence and the nature of reality. It introduces the concept of the Fluctlight, a digital representation of a person's consciousness, and delves into the moral implications of creating sentient beings within a virtual environment.