A blue frequency need you to come back," Petra said. "Not in body. You can't come back in body. But the key he calibration key that you held when you died—it's waking up. It has a frequency that Dr. Thorne never activated. The wind blew through tåhe trees, and the leaves sang their fourfold song. But I don't know if she'll listen to me. I'm not the person I was. I'm old. I'm tired. I've spent thirty years teaching other people to sing, and I've forgotten how to sing myself.
