The end of the world is upon us.

In four days all of humanity will be harvested by flying saucers from outer space. Only one man can stop it. The one man who knows it is coming: Henry Mickler.

A mechanic and part-time inventor, Mickler believes he is a time traveler from the future and the sole survivor of the impending apocalypse. He has sent himself back in time to warn humanity of this fate; he has come back to save mankind.

However, much to his chagrin, Henry Mickler is locked up against his will in an insane asylum.

His doctor, Sharron Brubaker, struggles to cure a man who is convinced the world will end in four days. As his ravings increase and the week comes to a close, Brubaker begins to doubt her diagnosis. Is she curing his delusion, or detaining mankind’s last hope on the eve of its destruction?