Out on a rural farm a young couple is making out in the barn when they here something outside--and part of an airplane engine crashes through the roof. They go outside to see bits of the plane strewn about. The guy finds part of a burnt boarding pass that's dated for tomorrow. There's also this whirlpool like cloud in the sky, which at first sucks the woman in and then the guy.
Then we go to the previous day, during which Dr Daniel Winter (Lou Diamon Phillips) steals a time-travel device he has invented, believing it to be too dangerous for the government to use. What it does is open a gateway to "null space", which is this sort of limbo, and through it can go backward or forwards in time. Agent Caleb Smith, heading out for a long overdue family vacation, is called back to the office to deal with this and tells his wife and daughter he'll meet them later on in Mexico. By coincidence, Dr. Winter is on this same flight and ends up transporting the plane to "null space". Now, Caleb has to somehow find another such device the Doctor made and rescue his family since we know what may happen to that plane.
This is a lame time-travel movie. The only time traveling jumps back and forth one day and that's only at the beginning and end of the movie. It's also one of those tales that ends in such a way that the events of the movie "never really happened". The computer generated effects are sub-par for this type of thing and even the plane looks fake, like a cartoon. Believe me, you have better things to do with your time.