Alpha Brian clears his throat. "I think the plan makes sense. We should move all the vulnerable people to the packhouse bunkers. Everyone else who's able should start training and prepare for what's coming," he says.

Everyone agrees with the plan, but I have something important to add.

"There's something I need to tell you all," I say, looking around the room before focusing on Leo.

I can see how tense he is - he must be wondering what I'm about to ...