Callum woke with a jolt. Someone was tapping him on the arm. He groaned as he turned to see Lena sitting beside him, looking at him, a concerned look etched upon her face.

"You're doing it again," she said softly. "You told me to wake you the next time you did."

Callum looked down at his hands. Sparks arced between his fingers. He didn't even need to click his fingers anymore it was almost as if the sparks had a will of their own. He frowned. If only he could work out ...