".hack//The Movie" is set in the year 2024, within the virtual reality MMORPG "The World R:X," a successor to the original "The World." The story centers on Sora, a skilled player who becomes trapped in the game after encountering a mysterious girl named Aura, a central figure in the ".hack" universe. Aura, a sentient AI, is pursued by a rogue program known as Libra, which seeks to absorb her to gain ultimate control over the game. Sora, determined to protect Aura, allies with other players, including Kite, a veteran of the original "The World," and Yuki, a new player with a personal connection to the game's developers.

As Sora and his companions navigate the virtual world, they uncover the deeper implications of Aura's existence and the dangers posed by Libra. The narrative explores themes of artificial intelligence, the boundaries between reality and virtual reality, and the ethical dilemmas surrounding the creation of sentient programs. The characters must confront their own motivations and the consequences of their actions within the game, which increasingly blurs the line between the digital and physical worlds.

The plot intensifies as Libra's influence grows, threatening not only the stability of "The World R:X" but also the real-world infrastructure supporting it. Sora and his allies must race against time to stop Libra, utilizing their skills and teamwork to overcome increasingly complex challenges. The story culminates in a climactic battle that tests the limits of their resolve and the strength of their bonds, ultimately determining the fate of both Aura and the virtual world itself. The film provides a self-contained narrative while expanding on the lore of the ".hack" series, offering a blend of action, mystery, and philosophical inquiry.