The episode begins with a quick recap of the events of "United".
The Romulans are disappointed that their marauding ships have failed to provoke the rift between the Andorians and the Tellarites for which they had hoped, so they decide to use them to destroy the starship Enterprise.
On Enterprise, it is determined that the marauding ships are being piloted telepathically by an Andorian. Commander Shran of the Andorian Imperial Guard proposes that, more specifically, the pilot might be an Aenar, but this seems unlikely since the Aenar are blind pacifists who live in the North pole of Andoria.
While Dr. Phlox and Commander T'Pol work on a device to take control of the marauding ships, Shran and Captain Archer go to Andoria to contact the Aenar. The Aenar refuse to help as they don't want to get involved in a war. However, Jhamel, whose brother Gareb has been missing, decides to help Archer and Shran. It turns out that the pilot of the marauding ships is in fact Gareb (tricked into helping the Romulans due to their lie that his sister is dead), and Jhamel reaches out to him. Gareb turns the marauding ships on each other, and the Romulans kill him.