There had always been a comfort in the woods, a sense of peace that came with nature. Especially the forest around the preserve. Derek had grown up there, he'd learned his control there, felt safe with family there. This was not any of those things. Just the closer he got the more on edge he was, fangs grinding as his jaw clenched tightly. This was, in no way, safe or welcoming.
He'd stopped just short of fully entering the forest when the familiar sound caught his ears, not just his name, but the voice. "Isaac?" Why would Isaac be... wherever here was? Isaac was meant to be safely back in Beacon Hills (or as safe as Beacon Hills tended to be, all things considered) with Scott and Stiles, not... here? There was movement in the trees, something that caught his attention long enough for Isaac's thumping heartbeat to catch his senses. He wanted to see what it was, but at the same time, an explanation would be easier if he just met Isaac rather than make him chase through the forest.
Later. He could check on that later.
Turning back towards town, eyes still glowing, fangs still dropped and claws out, Derek back tracked towards the town, expecting that Isaac would use his scent to find him, whatever it was they needed him for now.