The English Channel has never felt so narrow. In rural Sussex, war veteran John Cook has been tasked with preparing the resistance effort, should the worst happen. But even as the foreign threat looms, it's rumours of a missing child that are troubling Cook.

A twelve-year-old girl was evacuated from London and never seen again, and she's just the tip of the iceberg - countless evacuees haven't made it to their host families. As Cook investigates, he uncovers a dark conspiracy that reaches to the highest ranks of society.

He will do whatever it takes to make the culprits pay.

There are some lines you just don't cross.