The city was changing.
I stood at the window of the clinic, watching the lights flicker in the distance. The equation was back. Somehow, someway, it had returned. And it was spreading through Hellsmouth like a virus.
"Leon." Mira's voice was tense. "We need to move. Now."
I turned. She was standing at the door, her face pale, her eyes serious. Malcolm was beside her, his expression grim.
"What's happening?" I asked.
"I don't know. But something is wrong. The equation is active. It's spreading through the city's infrastructure. The power grid. The communications network. Everything."
"Then we stop it."
"How? We don't know where it's coming from. We don't know who's running it."
I was silent for a long moment. Then I said, "We find the source. We destroy it. Whatever it takes."
"Tha
