In Australia, four teenagers in a Sydney theater are astounded to hear the news that a nuclear war has broken out in Eastern Europe. They try to figure out the best way they can survive the coming conflagration.

In Australia, four teenagers in the Sydney Opera House are horrified to hear the news that nuclear war has broken out in Eastern Europe. They try to figure out the best way they can survive the coming conflagration. At the film's end, it is left uncertain whether Sydney will be hit by nuclear weapons, although the US spy facility at Pine Gap has been obliterated.—Tom Sellick