.hack//sign- Tempest- Episode #20

The episode begins with Tsukasa and Subaru sitting in a field, Subaru's hand on top of Tsukasa's. He asks if everything is still alright, she says yes.
Mimiru, after defeating a monster, sees Bear, and asks Bear what's wrong (there always seems to be something on his mind). Mimiru finds out from him that he's thinking about Tsukasa and other things. Mimiru says that since the original search for the Key of the Twilight, Bear and B.T. have been distant.
Sora is talking to someone he doesn't usually talk to- Silver Knight. Sora asks if he has flushed out the Player Killer yet. When Silver Knight says he has his pride at stake, Sora calls him a loser. He says he doesn't want to talk with a loser anymore.
It turns out he called B.T., because the two met. Sora asked B.T. to restrain Silver Knight so that they could use him as a pawn. B.T. actually agrees and goes to him. She goes over to Silver Knight and says she's found some respect for him, and then asks him if he wants to find the Key of the Twilight. When he asks if it even exsists, B.T. talks about the irregularities, like Tsukasa, the broken man, an upside-castle not on any map and giant monsters appearing out of nowhere. She says that at the source of these irregularities is where the Key is. Silver Knight then asks what it does. B.T. says she doesn't know, but wants Silver Knight to join them. He says he'll contact her later.
Subaru is talking to Bear alone and says that she and Tsukasa often sit and enjoy each other's company. Bear says time heals wounds, so they should stay close to each other. Whatever they have is good, he says.
Mimiru is in a building, when B.T. appears. They were both called by Bear, supposedly. Then Crim comes in and says he was contacted by Subaru. Bear comes to them and says he told Subaru to contact him. Bear says he might have even contacted Sora. Bear says he wants to continue the search for the Key of the Twilight.
Tsukasa and Subaru are in the fields again, this time at night. They gaze up at the starts for a bit, then Tsukasa tells Subaru that he can take her to his retreat. He also says that it's not as nice as it used to be, even when he's happy. Still, he takes her. When they arrive at the place, the girl resting atop the bed is gone, and the trees are completely bare. Subaru instantly notices the girl is gone.
B.T. tells the rest of the group that she'll go on ahead and goes off. Crim asks Bear how old he is. Bear says he'll be 47 this year and asks why Crim asked the question. Crim asks what age it is when you basically lose your sense of kid. Crim says that even if you're an adult, you still need to have some kid to play this game. Crim knows what Bear's motive for wanting the Key is, but Crim says he has a different motive for searching.
B.T. goes and meets up with Silver Knight, and then Sora appears. Sora asks B.T. what they plan to do, and she says they're going to go back to all the evidence. Sora makes a point of saying "Why do all that work when they can do it for us?" Sora says that they can let them do all the work, and then take their conclusions and move faster than them, but B.T. needs to see them through.
Subaru talks to Mimiru and they talk about Tsukasa. Subaru tells Mimiru that she found Tsukasa's place, but can't get back there without his power, and that the girl disappeared. She says that Tsukasa said "She took her away." Mimiru are confused about who 'she' is.
Tsukasa has to face the voice, which repeats the jazz about walking together. Then Tsukasa is raised into the air in a bright glowing sphere, and seems in great pain. His clothes start to tatter, and he is lowered onto the bed where the girl formerly rested. He says something very puzzling after he gains enough strength to talk. He says "I am not me."