When 80% of the human race starts migrating to a single point on the globe, failing medical student Rudy Deckart sets out across the disintegrating US to rescue his girlfriend, become a doctor, confront a murderous militia using the migration to start a new world order, and find a cure for the migration impulse that will save, or maybe destroy, humanity.
Rudy is cast adrift after leaving medical school. As the city falls apart, Rudy faces a grim choice and hits the road to find Karen, all the while wondering if this means he might really be a Traveler.