Is it almost midnight when the train moves slowly past the Dauntless compound. As it passes the front entrance, we jump from the cart, hand in hand. Clouds hang low in the sky; the moonlight casts an eerie glow over the tracks. The stars are just pinpricks of light penetrating the cloud cover. I can feel my claustrophobia creeping up on me.

His hand squeezes mine gently, and I turn to offer him a small yet grateful smile in return. I had learnt more about Tobias within the past couple of hours than I had about Caleb in sixteen years. It made me feel... nostalgic. How much did I really know about my brother?

I can feel the weight of Tobias' gaze, and I look up to meet his eyes. His eyebrows are drawn together. "What's on your mind?" he asks. His voice is quiet, yet husky.

I shake my head. "It's nothing," I say. Sometimes, the Abnegation girl within me can be a little bit judgemental.

He raises an eyebrow sceptically. A shadow covers half his face, so I only see the slight twinkle in one of his peculiar blue eyes. "You're a terrible liar, Tris."

I sigh, my lips pulling up at the corners slightly. "Actually, I consider myself a pretty good liar." I take a deep breath, and my grip on his tightens slightly. "Are all the Erudite traitors?" I ask, grimacing.

Tobias frowns. "Only those who believe what they're doing is right."

Only then does the realisation hit me. Of course Caleb is a traitor. He is my father's son, yet he still chose to transfer to the one place my father truly hated. If he honestly didn't believe the articles attacking Abnegation's values, he would have left before it was too late. But he hasn't.

"Oh."

I know that he has more questions, but I try my best to change the subject with the silent promise of 'later'. "We should get going," I say hastily. I take a few steps towards the door, tugging gently at his hand. "The others will be wondering where we are."

I hear the laughter as we approach the training room. When we reach the door, Tobias pulls his hand from mine and tucks it into the pocket of his pants. He shoots me an apologetic look, but I brush it off.

Christina jumps up from her seat and runs towards me when she notices us. I stifle a laugh when I see that she's only dressed in her bra and panties. The Abnegation part of me reprimands me for not looking away, but the Dauntless part grins internally.

"What happened to you?" I ask, the blood rushing to my cheeks when she glares at me.

Her expression darkens, and she raises a dark eyebrow. "I could ask you the same thing."

I sigh. I know that Christina won't let this go until she gets a full blown explanation. I guess our old factions never truly leave us. I force a small smile. "Later, Okay?"

Christina scowls, but nods reluctantly, knowing that she isn't going to get anything better from me right now.

She links her arm through mine and pulls me over to where she was sitting. She gestures for me to sit in the empty seat next to her.

I glance around the room, my curiosity getting the better of me. People are in different stages of nudity, and I can feel the heat creeping up the back of my neck. Thankfully, nobody is fully exposed as of yet, but I notice that Peter and Molly are dangerously close. Peter only wears his boxer shorts, while Molly is dressed scarcely in her bra. She crosses her legs and places her hands in her lap in attempt to... cover herself?

I try not to cringe, but the thought makes me want to hurl. I suddenly wish Tobias and I had stayed on the train.

Eric's eyes land on me as soon as I take my seat. "Welcome back," he hisses. I notice that he is missing his shirt. "Where. Were. You?" he demands, his expression dangerous. Before I have a chance to speak, he continues. "Actually, it doesn't matter."

My eyes meet Tobias' panicked ones. He looks vulnerable.

"Since you missed half the game, that puts you at an unfair advantage." His smirk widens. "You're out."