January 19th, 2155: While the Enterprise crew is attending a meeting of Minister Samuels with alien delegates on Earth, a fatally injured woman stumbles into the conference room. She warns T'Pol that someone is threatening her life and hands her a lock of hair. To everyone's surprise Phlox finds out that the hair is from a child with Vulcan and human DNA, a girl whose parents are T'Pol and Tucker. The woman, whose name was Susan Khouri, has been working for an isolationist movement known as "Terra Prime". Phlox's analysis that she used to take a medication against zero-g effects allows the crew to trace back her way. While T'Pol and Trip infiltrate the mining colony Orpheus on Earth's Moon, Mayweather's love interest, the journalist Gannett Brooks, is arrested as a spy working for Terra Prime. On the Moon, Trip is invited to join an assembly of Terra Prime supporters. But he and T'Pol are uncovered. Paxton, the owner of Orpheus and leader of Terra Prime, orders the colony, which he has transformed to a large starship, to lift off and head for Mars. On Mars he takes possession of a verteron weapon and he demands that every alien leave the Sol System...

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