The story follows three girls, Mai Minase, Yuki Aihara, and Kyoko Tohno, and a former CC Corp. director of the Japanese version of The World, Junichiro Tokuoka. They investigate as to why several people have fallen into a coma while playing the game. The amine starts with the collapse of Mai and her boyfriend, (Tomonari Kasumi). It is soon revealed that she heard a certain sound (which is also present at important points in .hack//Sign) shortly before collapsing. She later wakes up to the same sound, the sound that tunes. â€œA In C Minorâ€. Through the knowledge of all the the characters, the constantly search for the answer to why there have been so many victims due to â€œThe Worldâ€. Will they be able to battle something that doesnâ€™t even exist in the real world?
Bundled along with a free game, .hack//Versus, on the .hack//Sekai no Mukou ni Blu-ray disc, is a special called "The Thanatos Report". This special connects the events of the game with the events of the movie and "reveal the last truth". The protagonist of the special is Dave; a character who also appears in the main movie. The special takes place in both 2024 (the year in which the movie takes place) and 2025 (the year in which the game .hack//Versus takes place).
.hack//Roots is the prequel to the .hack// videogames. It follows the story of Haseo a member of the Twilight Brigade guild. In the year 2015 the C.C. Corpâ€™s building was burned down, and with it most of the data for â€œThe Worldâ€ was lost. By mixing the remaining data with that of another game, the C.C. Corp was able to create the game, â€œThe World: R2?, unlike the games before this game allowed player versus player combat. The anime starts when Haseo logs into The World R:2 for the first time and falls victim to the PKers that reside within. He is saved by Ovan, which prompts him to join the Twilight Brigade. The Twilight Brigade members are on a mission to find the Key of the Twilight, however, the TAN guild opposes. Their current mission is to find the 6 virus cores before TAN does, and Haseo has 2 of them, how will he escape from the TAN Guild, and find the Key of Twilight, which might be the answer to everything.
Set four years after the .hack games, the anime follows the adventures of a pair of twinsâ€“Rena and Shugo. The story takes place in a fictional MMORPG called The World. After winning a contest, Rena is in possession of a pair of avatars in the design of the legendary .hackers known as Kite and Black Rose. After an odd occurrence, Shugo obtains the Twilight Bracelet. Shugo embarks on an adventure to find â€œAuraâ€ and unravel the mystery of the Twilight Bracelet. An item that both aids and hinders those involved with it. Along the way, Shugo and Rena meet many friends. Together, the friends play together in The World, but the fun quickly ends when Rena is killed by a monster and goes into a coma. Shugo and friends frantically search for a solution, whilst a group of four children are planning something terrible on the outside world. What will become of Rena and Shugo, during their adventure in â€œThe Worldâ€?
Taking place 2 years after the â€œPlutoâ€™s Kissâ€ crisis. â€œThe Worldâ€ once again returns. This time being the only PC game in existence. Tsubasa a boy who started playing only a few weeks before, finds himself taken to a mysterious zone, where he meets Aura, Morganna, and a mysterious player that has the appearance of a cat. Soon after realizing that he canâ€™t logout, he is forced to stay in â€œThe Worldâ€, but unlike other characters he can still feel pain, he still has his emotions. He slowly separates himself from those who try to help him, the only ones that can help him. His friends Bear and Black Rose, constantly try to comfort him in his struggle, but he always pushes them away. He only wants to search for the answer to why he canâ€™t logout, and to the real question of who he really is.