It's no surprise that Sam, Harry, and Taylor greet Jace the moment he appears at the school, eager looks on all their faces. Jace doesn't even wait for them to ask, instead answering the question he knows is coming before it comes in the first place.

"It was so weird! The lights were flickering and it got all cold and it was insane!"

Jace barely has time to register the shocked looks on their faces before Harry begins explaining, "That's him! That's the ghost! He was in the room with you, watching you!"

"And is that a good thing?" Jace asks.

"It could go either way," Taylor explains. "Maybe he likes you. Maybe he hates you and wants to kill you. Kinda a tossup there."

Jace raises an eyebrow. And they claim to be "experts." That's an interesting idea of an expert opinion right there.

"Well, what does he want?" Jace asks. "Or, you know, ghosts in general."

"It's kinda like people," Taylor tells him. "It varies from ghost to ghost. I think your ghost just wants his house back. That's why he didn't hesitate to turn off the light, or to move the chair. He knows it's his house, and he can do whatever he wants. He's really made himself at home over the last couple of centuries."

Jace pauses as that sinks in. The light? The chair? That's actually happened to him — and happened right after he said it would, too. But he's looking way too far into it. He has to be. He just lost track of the light, and his dad is a drunken idiot, plain as that.

So, obviously, he's not actually concerned at all, and is only playing along when he says, "So I don't have anything to worry about, you think? I mean, he's just going to... coexist?"

"Maybe," Sam allows, "but maybe he feels like it's his house, and you shouldn't be living there." He must see Jace's worried look — not that he's worried, of course; just interested, obviously — because he clarifies, "Oh, but don't worry. He's still in the Halfworld — between here and there. He can't hurt you; not unless he somehow manages to cross over, but that's nothing you have to worry about."

Nothing to worry about? It sure sounds like something to worry about! If ghosts were real and this wasn't an act, of course, because there's no way Jace actually believes this. Just in case, though, he asks, "And is it possible to cross over?"

No one answers at first, so Sam does, with, "Not that we know of, no. If it is possible, it would take a tremendous amount of power, and the ghost would basically be rendered helpless. Basically, the ghost is harmless." Sam gives him a reassuring smile.

Jace just nods. There's no way there's actually a ghost living — as much as a ghost can live — in his house. That would be ridiculous. So why does he feel so nervous about going home?