Lily's P.O.V:

Just when I thought the day couldn't get any worse, Liam Bailey and the wild red-head that had attacked me in the forest showed up at school. It had been a long day and I was uncharacteristically lethargic. Normally, I'd be jumping in my seat to answer questions about the Civil War and Hyperbole and Biochemistry but today I wanted to curl in a ball or just become invisible. I was even tempted to put my headphones in during calculus which I usually enjoyed.
So when the Alphas had turned up in chem lab, you can expect I wasn't at all enthusiastic.
"Good morning, class," Mr. Harris said once the newbies took their seats "Please! Please! One at a time. Now, we have two new students whom I'm sure you'll all be extremely welcoming to."
Nikki shot me a malicious smile and I resisted the urge to give her the finger. Luckily, I'd been assigned to Isaac – who was still pissed – and Stiles – who couldn't stop whispering about the book, no matter how many warning looks I gave him. So basically, I was screwed. But hey, at least I didn't have to entertain the new bitch. Ha-ha, bitch.

I also felt bad about Delilah. I'd neglected to call or speak to her at all for two whole weeks and she was still freaked about Olivia just leaving, no help from me. Yep, I was a shitty friend. I admit it. And I was beginning to think that that was the price you paid for knowing the things I do in Beacon Hills.

I was thankful there wasn't much tension from Isaac, in fact, he didn't seem angry that much at all really but he was still ignoring me.
I was beginning to relax now and actually enjoying what I was doing. Me and Stiles had a mini-domestic about the right way to apply an alkali to the solution whilst Isaac bickered on. "Hey," he said, in an undertone actually acknowledging me. "Does any of this stuff blow up?"
"Only if you do it wrong." Stiles replied before I could answer.
"I'm thinking more practical applications. Bombs. Stuff like that."
I saw Stiles visibly roll his eyes as I yelped, "Isaac!" God, he really was distracting. Stiles slapped his hand as he reached for the re-agents – which had nothing to do with what we were doing – as I tried to focus on the details of the experiment.

All three of us – the wolf, the witch and the human – were concentrating so hard and were so engrossed in the experiment we didn't hear the footsteps approaching behind us.
The first thing I knew about it was a precise, searing pain down the left side of my back. I dropped the beaker I was holding, sending alkali cascading across the table and screamed – couldn't help it because, oh fuck! That hurt! – and Isaac whirled, grabbing someone who was backing away.
It was Nikki, the Alpha girl. She snarled and punched him square in the nose – which had to hurt because she was an Alpha and he was a Beta - but Isaac didn't let go.
I was twisting, gasping in pain and trying to work out what was going on with my back. Mr. Harris came rushing over and the other students started realizing there was something wrong; or at least something more interesting than lab work.
I tried to angle my body at a mirror to see what was going on because it hurt. I smelt something terrible. "Oh my God!" Harris blurted which wasn't at all comforting. What was also unsettling was the fact that the beaker Nikki had been holding wasn't even half-empty. Allison, thinking fast, snatched the bottle of water off Harris's desk and dumped the contents over my back as Harris rushed to the supply closet. He came back with a box of backing soda. I heard a sizzle when it hit my skin and almost blacked out. "Here. Sit. Sit down. McCall! Ring for an ambulance. Go!"
As I sank breathlessly into another stool, a lower one, Harris grabbed a pair of scissors and cut through my shirt, folded it aside and sliced my bra straps. I just managed to grab it before the whole thing slid down.
I tried not to cry and failed; settling for weak sobs and biting my lip until I tasted blood.
"It was an accident!" Nikki cried, standing on her tiptoes as Isaac twisted harder. "I tripped! I'm sorry! I didn't mean it…"
"We're not working with H20S04 today," Harris said grimly, "You've got no reason to be walking round with it. Lily? How bad is the pain?" I forced myself to look away from Isaac and Nikki and caught Liam's eye instead He was stood next to resident mean girl, Lydia who actually seemed genuinely worried for me which I guess must be a new thing for her. Liam looked furious… and dangerous. Red tinted his eyes.
"I – it's okay. I feel fine." But truthfully I didn't know how I felt. The pain eased slightly as the baking soda did it's work. Acid has a low PH; baking soda has a high one… Well, at least I had some grasp of chemistry even now.
Yet I still felt suffocated, sick, cold and light-headed. Shock, probably. Like the feeling I'd got when Olivia had stabbed me. And embarrassment because God, I was half-naked in the middle….Shit. The scars. Well, of course this day had to be pushed to the largest level of bad there was. "Can I put something on, sir?"
"No you can't let anything touch that. The burn is through several layers of skin. It'll need treatment. Just, sit still." Harris turned to Isaac and Nikki and leved a finger at the girl, "You're talking to the police. I don't care if it's your first day; I will not tolerate that kind of attack in my classroom. And I don't care who your friends are!"
So he knew. Or at least he knew enough. "Lily," Stiles whispered at a safe distance. "Why aren't you healing?"
"We don't heal from burns," I said through gritted teeth "Why do you think they used to burn witches at the stake?"
Isaac was whispering something bellow human and witch hearing level to Nikki, but, it couldn't be good, by the look on the girl's face.
"Sir?" I asked faintly. "Can I have a make-up on the lab work? And-"
And then I passed out before I could add, and I'm sorry for the mess.