Archer and the crew are on Earth for a historic conference at Starfleet Headquarters to establish an interplanetary coalition. But the plans are menaced by a fanatical xenophobe, John Frederick Paxton. He leads Terra Prime, an underground Human isolationist movement plotting against the government and threatening to undermine the talks. This radical faction opposes the increasing number and influence of aliens on Earth and advocates expelling all non-Humans from Earth and the rest of the Sol system.