 The film centers on a man who experiences what his life might have been if he had made a different decision earlier in his life.Jack and Kate, who have been together since college, are at JFK Airport, where Jack is about to leave to take up a twelve-month internship with Barclays in London.Kate fears the separation will be detrimental to their relationship and asks him not to go, but he reassures her, saying their love is strong enough to last, and he flies out.