En el año 2005, un virus informático llamado "el Beso de Plutón" hizo caer completamente la red de internet mundial. En el 2007, después de la restauración de la red, se creó y se puso a la venta un juego online (MMORPG) llamado "El Mundo". El anime se centra principalmente en Tsukasa, quien obtiene un poder que daña al jugador en la vida real. De repente se despierta para encontrarse en "El Mundo", siendo capaz de sentir, oler, tocar, ver y oír todo tal y como si él estuviera realmente allí. Intenta desconectar pero falla en ello. Siendo incapaz de recordar qué paso antes de despertar, vaga alrededor sin rumbo para encontrar respuestas. Mientras hace esto, los moderadores del sistema, los Caballeros Escarlata, sospechan que ha estado trabajando con hackers a causa del retorcido personaje con quien se encuentra. Tsukasa encuentra un objeto mágico que concede el poder de usar este temido "Guardián" que le protegerá de todo daño.
.hack//Sign (Temporada 3)
Welcome to "The World" (Episodio 1)
Fecha de emisión: 2006-04-06
Duración: 24 min
Sinopsis: Haseo's entrance into The World is marked by a hostile attack – and a crushing defeat. His adventure appears to be over before it started until a mysterious stranger gives him new life.
Twilight Brigade (Episodio 2)
Fecha de emisión: 2006-04-13
Duración: 24 min
Sinopsis: His search for information about his mysterious savior leads to an invitation for Haseo to join Ovan’s guild.
Join (Episodio 3)
Guionista: Kouhei Urasawa
Fecha de emisión: 2006-04-20
Duración: 24 min
Sinopsis: Rumors being spread about Haseo lead to attacks against him. Invitations to join two separate guilds intrigue him, but an encounter with Shino will influence his choice.
Fore Feel (Episodio 4)
Fecha de emisión: 2006-04-27
Duración: 24 min
Sinopsis: Haseo embarks on a journey through the game on a quest to level up, Sakisaka grows suspicious, and Tabby meets an untimely end.
Distrust (Episodio 5)
Fecha de emisión: 2006-05-04
Duración: 24 min
Sinopsis: Haseo is suspected of acting as a spy, putting him at odds with the Twilight Bridgade. His actions after the falling out only serve to further implicate him.
Conflict (Episodio 6)
Fecha de emisión: 2006-05-11
Duración: 24 min
Sinopsis: Concerns over Sakisaka’s loyalty arise, The World experiences technical difficulties, and Haseo unveils a few new tricks.
Intrigue (Episodio 7)
Fecha de emisión: 2006-05-18
Duración: 24 min
Sinopsis: Strange occurrences plague The World as Haseo wanders the Lost Grounds. Later, a group exploration leads to shocking new knowledge and a sudden disappearance!
Starting (Episodio 8)
Fecha de emisión: 2006-05-25
Duración: 24 min
Sinopsis: The group stumbles upon a portal, Haseo shares an encounter with Ender, and more is learned about the virus cores.
Melee (Episodio 9)
Fecha de emisión: 2006-06-01
Duración: 24 min
Sinopsis: While attempting to collect all the Virus Cores, the Twilight Brigade is attacked by adversaries – and relocated to a mysterious, unknown area.
Missing (Episodio 10)
Fecha de emisión: 2006-06-08
Duración: 24 min
Sinopsis: Ovan wanders into a trap while searching for the Key of Twilight. Shino, in an attempt to secure Ovan’s release, makes a bold threat!
Discord (Episodio 11)
Fecha de emisión: 2006-06-15
Duración: 24 min
Sinopsis: Gord gives serious thought to leaving The World for good, and the administrators take serious action against some online outlaws.
Breakup (Episodio 12)
Fecha de emisión: 2006-06-22
Duración: 24 min
Sinopsis: The Twilight Brigade is forcibly disbanded, Gord finally arrives at a decision regarding his involvement in The World, and Haseo makes a vow to Shino.
Tragedy (Episodio 13)
Fecha de emisión: 2006-06-29
Duración: 24 min
Sinopsis: Tabby has some shocking news for Haseo, and Shino’s precious data beings to disappear.
Unreturner (Episodio 14)
Fecha de emisión: 2006-07-06
Duración: 24 min
Sinopsis: Haseo is devastated about his inability to prevent Shino from falling into a comatose state. Tabby has plans for a new guild, but its lack of members is troubling.
Pad (Episodio 15)
Fecha de emisión: 2006-07-13
Duración: 24 min
Sinopsis: Tabby encounters two players who are new to The World. Later, she learns the secrets to leveling up, and Haseo embarks on a quest for revenge.
Resolution (Episodio 16)
Fecha de emisión: 2006-07-20
Duración: 24 min
Sinopsis: Phyllo attempts to comfort Haseo, who continues to agonize over his comatose friend. A dangerous new quest – and the promise of newfound power – tempts Haseo.
Painful Forest (Episodio 17)
Fecha de emisión: 2006-07-27
Duración: 24 min
Sinopsis: Tabby’s been worried about Haseo since his departure to the Forest of Pain. She expresses her concern to Subaro, who is instructed by Pi to follow Haseo into the forest. Meanwhile, Yata and Pi prod Phyllo for information about his relationship with Ovan.
Limit (Episodio 18)
Fecha de emisión: 2006-08-10
Duración: 24 min
Sinopsis: Tabby is still struggling with her inability to help Haseo in the Forest of Pain. In the forest, Haseo grows frustrated with the ever-growing amount of monsters he must fight before going deeper, but his quest for more power may be his downfall.
Violation (Episodio 19)
Fecha de emisión: 2006-08-17
Duración: 24 min
Sinopsis: Tawaraya returns unde the moniker “Tohta” to discover a gang of money traders has been flooding the market, creating high inflation. Despite his quest for secrecy, Tohta can’t stand back and let the money traders fleece innocent players, and decides to intervene.
Pursuit (Episodio 20)
Fecha de emisión: 2006-08-24
Duración: 24 min
Sinopsis: As Haseo’s search for information about Tri-Edge continues, his sanity begins to slip away, and in a murderous rage he kills several PKs. Yata and Pi are still on the hunt for Haseo’s factor. They send Subaro to retrieve it, but she can’t overcome Haseo’s manic strength.
Defeat (Episodio 21)
Fecha de emisión: 2006-08-31
Duración: 24 min
Sinopsis: A mysterious new player, Midori, has started a “hit-me-if-you-can” service. Haseo, still in the grips of manic power, enlists her services in order to discover Tri-Edge’s whereabouts. Meanwhile, Tohka encourages Tabby to start her own guild.
Bonds (Episodio 22)
Fecha de emisión: 2006-09-07
Duración: 24 min
Sinopsis: Tabby starts a new healing guild, but so far they haven’t had much success. Tohka points out that their levels are way to low to help anyone, and demands they go out and raise them. Haseo finally makes an appearance in town, and Phyllo warns him about the dangers of being single-minded.
Trial (Episodio 23)
Fecha de emisión: 2006-09-14
Duración: 24 min
Sinopsis: Haseo, consumed by a violent mania, will stop at nothing to find Tri-Edge, even it if means slaughtering any Player Killer who steps in his way. But while on his murderous rampage he’s left behind a trail of PK enemies who band together to stop him.
Confront (Episodio 24)
Fecha de emisión: 2006-09-21
Duración: 24 min
Sinopsis: After brutally slaughtering all the PKers, Haseo earns the nickname “The Terror of Death.” Still in the grips of insanity, Haseo refuses help or warnings from his old guild. But when Haseo finally encounters Tri-Edge, will he able to carry out his plan?
Truth (Episodio 25)
Fecha de emisión: 2006-09-28
Duración: 24 min
Sinopsis: There’s been no sign of Haseo for several days now, and rumors swirl that he’s quit for good. In his absence, Tabby has a realization, and also discovers a new love interest! Meanwhile, Phyllo divulges something shocking to Tohta.
Determination (Episodio 26)
Fecha de emisión: 2006-09-28
Duración: 24 min
Sinopsis: Haseo reappears after his hiatus only to receive devastating news about Phyllo. Tabby finally discovers the confidence to make her own decisions, and informs Haseo she has decided to become a nurse in order to save Shino. Now, Haseo is alone with only his memories to keep him company.
