At 17:45 Tom headed towards the cluster of bedrooms. The dark tunnels beneath the city wound in unpredictable patterns, but he was starting to get used to the feel of their winding trail. Ellie popped out of a corridor into his path.

"Hey, there!" She said brightly.

"Hi."

"Where are you headed off to so quickly?"

"I was going to take Alex to dinner. I've got the whole thing set up."

Ellie quirked her lips and narrowed her eyes. "Is that ...