Sarah Jane scanned the orange and turquoise room. Her nose crinkled at the unpleasant smell of oil wafting around her. What aspect of a factory could appeal in the slightest to Ruby? The beeping had ceased. Maybe Stuart was right - perhaps Ruby was trying, this time, to be the element of surprise with some booby trap. She looked around once more, then turned.
Somewhere, her actions replayed on a screen.
Someone was watching her.