Deep in the Australian Outback, two facilities operate side by side, separated by a fence.

Amanda Richardson works in a top-secret US intelligence gathering facility. Lucas Kahn works in the neighbouring Australian satellite tracking observatory.

A chance encounter through double-glazed windows, and the realisation they can communicate with Auslan sign language, develops into a complicated romance.

What they learn from each other reveals a terrifying political endgame - and people will kill to keep that a secret.