The Lakota yet picks up another distress call; this time it is from a Starfleet scientific outpost. The residents on the planet have the Starfleet scientists hostage and demand weapons and technology. The Lakota crew are sent down to negotiate or deal with them however necessary. However the deal does not work out and a firefight ensues.
The crew manages to find the lab only to discover they were experimenting with dimensional travel. Apparently the hostile residents were from the Mirror Universe that escaped from it and were desperately trying to stay in the current universe they inhabited.
An explosion at the lab occurs forever destroying the lab with its dimensional technology in it. Whether anyone else escaped from the Mirror Universe or not is unknown.
Oddly, when the mission was complete, the away-team could not be beamed aboard the Lakota. The manage to find a way back on board via shuttle but now they realize they have been attacked by hostile aliens and that the Senior Bridge Staff has all but been murdered!