It's twenty hours to landing. A lot can happen in twenty hours . . .
You're on board the first non-stop flight from London to Sydney. It's a landmark journey, and the world is watching.
Shortly after take-off, you receive a chilling anonymous note.
There are people on this plane intent on bringing it down - and you're the key to their plan.
You'd never help them, even if your life depended on it.
But they have your daughter . . . So now you have to choose.