Annabel walked alongside Tristan, two of her short strides for every one of his long ones. He walked so fast, or maybe he was just trying to catch up with the new teacher? She basically ran beside him.
The teacher lead them downstairs to the old lab that nobody used anymore. Annabel thought that that was odd, that the principal would want to see them there, but she shrugged it off. They entered the room, and everything went black.
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Annalee later woke up to the sound of her alarm going off. She hit the snooze and then rolled off of her bed, going to the bathroom to brush her teeth. Then it hit her...how had she gotten there? The last thing that she could remember was entering the old lab that was downstairs. She remembered that Tristan had been there with her, so she got ready and ran to Tristan's room, banging on the door to see if he would remember what had happened.
(The same thing happened to Tristan. He wouldn't remember anything. But if you want him to have a fight scene or something, the way that Annabel blacked out was that they had some sleep stuff in a needle and they gave her the shot.)