Astrid woke in the middle of the night, heart pounding. It took her a moment to realize what had called her from sleep, but as she lay there a silvery voice seemed to whisper through the air, sending goosebumps along her skin. She bolted upright, clutching the blanket in white-knuckled hands. "Raiden," she hissed. "Wake up."
He opened one eye, looking torn between grumpiness and concern. "What's wrong?" he murmured groggily.
The voice sang through Astrid's ears again and she shuddered. "That. That...voice. It keeps singing to me."
Raiden sat up now, studying Astrid's pale face intently. "I don't hear anything," he said, clasping her hands in his. "Tell me when you hear it again."
Astrid nodded and the two fell into a tense silence, both listening intently. When the voice came again, it
