Having conquered Voyager, a Hirogen commander commits several holodecks to run programs of Federation histories, wherein most of the bridge officers, under mind-control, become characters in various violent scenarios. With many hooked into a World War 2 French Resistance story, only the Doctor and two others are free to attempt a resistance of their own while also busy keeping fallen crewmen alive and adapting Voyager itself into one big holodeck.
—statmanjeff