We both look up at the screen, and I think Christina nearly faints when we see Uriah show up on screen - with me. I feel a strange prickling heat ripple across my scalp and my vision telescopes out, as though I'm suddenly somewhere far away. I realize Christina is saying my name, her hand on my arm.

"Tobias," she says urgently, "you have to watch. She might be trying to talk to you." I shake my head a little and push her hand off my arm, stepping closer to the table.

On screen, I am taking the gun from Tris, her eyes desperate and hopeful. My face, however, is stone still.

"We found Marcus in the next room, caught in a simulation. You came up here with him," I say, my voice flat.

She tilts her chin up at me, meeting my flinty look without blinking. And in spite of everything, I smile briefly watching the screen. Defiant, as always, even when it's me.

The virtual Tobias is enraged, though, visibly shaking. "I trusted you," I spit out. "I trusted you and you abandoned me to work with him?" The combination of hurt and menace in my voice leaves me shaking in real life - this is how she sees me? This is how I am?

"Don't. Move." Christina whispers harshly to me, putting her hand on my arm again. I had taken a step toward Tris, reaching out for her. I turn a cold look on Christina, who returns it without flinching. "You need to hear what she has to say if you want to help her."

"It's not about you, Tobias." She said that to me earlier, when I first saw Marcus show up in Tris's dreams.

"He told me something," Tris says to virtual Tobias. "He told me something, and everything my brother said, everything Jeanine said while I was in Erudite headquarters, fit perfectly with what he told me. And I wanted - I needed to know the truth."

Screen Tobias is raising his voice at her now, his eyes hard and critical. "The truth. You think you learned the truth from a liar, a traitor, and a sociopath?"

Tori says something, but I am only hearing Tris now. I can't even bear to look at the man onscreen, because I recognize him all too well. I know I am capable of that, and more.

"I think...I think that you are the liar," Tris says, voice quaking at first but growing steady as the words tumble out. "You tell me you love me, you trust me, you think I'm more perceptive than the average person. And the first second that belief in my perceptiveness, that trust, that love is put to the test, it all falls apart." She is crying now, but pays no attention to the tears dripping off her chin. "So you must have lied when you told me all those things. You must have, because I can't believe your love is really that feeble."

Now the tears are dripping off my chin, too. But only here in real life. On screen, my face is once again a blank mask, my glittering eyes giving away my fury. She steps closer to me, her voice so low that only I can hear her on screen. Both Christina and I move closer to listen to what she's saying.

"I am still the person who would have died rather than kill you," she says. "I am exactly who you think I am. And right now, I'm telling you that I know, I know this information will change everything. Everything we have done, and everything we are about to do." She stares up at me, urgently but not pleadingly, because Tris would never beg, not even me. But I do not move, except to look away, as though her gaze is too intense for me.

"Coward," I hiss at myself. I turn away, shaking off Christina's arm. I go back to the encoding computer and put a vial of the serum in the upload bracket. I can feel Christina's eyes on me as I carefully check through the code, adding some new details, based on what I just heard.

"If you want to do something useful," I say neutrally, "you could destroy the rest of the serum in that little refrigerator."

There's a long silence. "Okay," she says, "but I'm going to try something first." I glance over my shoulder and see her leaning over Tris, one hand on her forehead.

"Tris," she says, "you're in a simulation. It's a simulation. Think about it. Does it make sense? Are these things really happening to you?"

I tap the upload sequence, and watch as the system loads the transmitters into the serum. I don't know if this will work, but I hope if I inject us both with the same serum, it will push her into this new program with me, which has me saving her and waking us both up.

"Look," Christina says. On screen, Uriah has brought Tris to the main lobby of Erudite, to Christina.

Christina.

They update each other, but say nothing that indicates Tris heard Christina's message to fight the simulation.

Then I appear on screen, walking past Tris without even looking at her, and I grab Caleb from where he is cringing on the floor. "I want you to disarm the security system for Jeanine's laboratory," I say coldly, wrenching him to his feet. "So that the factionless can access her computer." I leave with Caleb, my face full of hard lines, never once looking at Tris - or anyone else.

Back in the lab, I turn back to the computer. The upload is nearly complete.

The sound of running feet, slapping against the hallway gets my attention, though Christina does not look away from the simulation.