Derek slowly wakes to the buzzing sound and feel of his phone ringing, which is still in his hand on his lap from when he tried to text Stiles. His thumb slides to hit the symbol to answer the call, but he doesn't have the energy to lift the arm, let alone an arm and the phone. He doesn't even know who's calling until he sees the name next to the timer for the call. "Stiles," he says after a moment, probably not loud enough for the other side to hear. "Are they okay?"
Stiles can barely hear the voice on the other end, but he knows Derek picked up. So he's alive. The realization is a punch to the gut and sends Stiles' mind realing.
He tries to listen carefully, curses when he can't understand anything.
"We thought you were dead!" he shouts. "Where are you? Dude, I know you're probably hurt but please. Please. You need to tell me where you are so I can find you!"