Tensions are at an all-time high with Chekov in a dire medical state while his evil doppelgnger, Akris, is supplying the Romulans with the Nightbringer weapon. The Enterprise crew's mission is clear: infiltrate the Romulan dreadnought and destroy the Nightbringer before Akris can bring the destruction he's inflicted upon his universe into theirs. But can Kirk and Nyota set their differences aside to ensure a peaceful resolution and avoid sparking a war with the Romulans? Rated T