In the Mirror Universe, Commander Archer mutinies against Captain Forrest to seize a futuristic Earth starship found in Tholian space.
In the Mirror Universe, the ISS Enterprise serves the brutal Terran Empire. Its first officer, Commander Jonathan Archer, learns that the Tholians have captured a ship from the future, and he stages a mutiny against Captain Maximilian Forrest so that he can go after it.
The crew enters Tholian space and finds the USS Defiant, a 23rd-century Starfleet ship from the prime universe that fell through an interphase rift, as seen in the original series. The episode features a new opening credits sequence reflecting the Terran Empire's history of conquest. It was directed by James L. Conway and written by Mike Sussman.