No summary provided, so here's my TV Guide version:
The Lone Gunmen help sort out the whole Diana issue and help play cupid, but just as things are finally working out, Scully is plagued by ever-worsening nightmares.
Frohike wanted to give Byers a chance to cut loose, or as she put it "get that steel rod removed from his ass", and this was the result. Byers plays a big part in this X-File, in which Scully is tortured once again.
This is set after the events of One Son, and it's quite satisfying that Scully's concerns are validated. I also confess to a few little chuckles over place names in this story.