I switched off my bedside light and dropped into an exhausted sleep.

A heavy hand pushed down into the middle of my back, pinning my chest flat to the mattress.

Before I could raise my arms, the buzzing started against the back of my neck, a sharp, high electric whine that rattled right through my teeth.

Cold metal raked across my scalp, and thick, heavy hanks of black hair tumbled over my bare shoulders and piled up on the white sheet beside my face.

I wrenched sideways with all the strength in my shoulders, shoving backward until the grip slid off my nightshirt.