so they drive out of this collapsing city, somehow manage to get to a plane
then they drive to Yellowstone to get the map to China, the volcano explodes and they get the hell out of there
so they find this Russian guy with a huge plane and go to land in Hawaii, but it's on fire oh no. They don't have enough fuel so they're going to crash.
But the entire Earth conveniently shifts so they crash-land right in China. Then they get kicked off, but manage to find some locals sneaking on anyway.
They get on, but the flood is coming and they shut the doors just in time and the unimportant people die but everyone else lives.
The end.