.hack//Roots is an anime series that serves as a prequel to the video game series .hack//G.U.. It follows the story of Haseo, a player in the virtual MMORPG The World, who is on a quest to uncover the truth behind a mysterious player killer known as Tri-Edge. The series explores themes of friendship, betrayal, and the impact of virtual reality on real life. The narrative is set in a richly developed online world, where players interact and form alliances. As Haseo navigates challenges and encounters various characters, he learns about the complexities of the game and the consequences of his actions within it. The series delves into the blurred lines between reality and the digital realm.