Edith Traviers activates Centurion by calling Seneca Roberts and ordering him to collect his team and report to Martin Manor. Seneca leaves his home in the western suburbs of Chicago and heads to St. Charles, Illinois to pick up Ward. What he finds in St. Charles is nothing short of the end of the world.

Meanwhile, in Sault Ste. Marie, Michigan, Darren Bruce, a grad student working on an archaelogical dig site, helps uncover a viking longship buried for a thousand years. While celebrating that night, rumors spread that the government is locking down all border crossings, and quarantining cities. Panic ensues, and Darren and his colleagues must find safety in an ever dangerous town.

In Beacon Point, Michigan, Pastor Alan Walsh discovers something is wrong when his congregation fails to show up for a regular sermon and strangers arrive with ill tidings.