You're on a routine flight from London to LA. Hundreds of people are on board - including your estranged son, Theo. Ten hours into the flight, something goes terribly wrong. The engines fail. The plane enters a steep dive. You, and everyone else on board, die instantly. Then, you wake up. It's one hour before the crash. You can't believe it - you're alive. Your beloved son is safe. Until, terrifyingly, the same chain of events repeats itself. Again, and again, and again. You're the only one who knows what's about to happen. And the lives of everyone on board depend on you.