Who| Karkat + YOU, later Karkat + Signless
What| Karkat isn't dead anymore. He's trying to find Signless to clear up a few things. (Unfortunately, Signless is busy learning about Rome.)
Where| inside the Training Center
When| after Karkat dies during Week Seven
Warnings/Notes| hells of swearing

Karkat... isn't dead anymore. Which was weird, because he quite vividly remembers dying and he doesn't remember anyone resurrection kissing him (not that he knows if that kind of shit would even work outside the Medium.)

The point was, however, that if he isn't dead then neither is the Signless probably and that meant that Karkat actually has the chance to clear up a few important things with the older troll--especially about that unintentional shoosh-pap, but about their shared mutation too.

Unfortunately, Signless evidently isn't part of the same "district" that Karkat had been assigned to, so in order to find him Karkat is going to have to venture out into the Training Center's common area.