A remote world in the Pernaia system where the Vulcan fugitive Menos was living in 2152 when T'Pol, Archer and Mayweather were sent to capture him.
Pernaia Prime is the setting of most of the Enterprise episode The Seventh. It is a cold, out-of-the-way world with a rough trading outpost, the sort of place where few questions are asked.
The Vulcan Ministry of Security learns that Menos, a former undercover agent who never came home from an assignment on Agaron, is living there and working as a freight hauler. T'Pol, who failed to bring him in years before, is ordered to finish the job, and she asks Archer to come with her.
A storm keeps the shuttlepod on the ground, and while they wait Menos insists he is an innocent man with a family. The delay brings back a memory T'Pol had suppressed: that she killed another fugitive, Jossen, during the original pursuit.