The settings change from scene to scene, all the sub girls whimper admirably, but Mistress Christiana is a little lethargic in her punishments and repetitive in her patter.
It seems that in "real life," Christiana is a guard at a prison. The girls in stir fantasize about her after lights out, each one in turn dreaming about Christiana topping them. The settings of their dreams change from a Rinse Dream-like cluttered, smoky realm, to a typical dungeon, to a topless club. The scenes are all fairly brief.
However, the standout scene of the tape is unrelated to the above narrative. Appended to the end is a Sharon Kane/Janis Jones scene, where supposedly they are lovers in reality; but Jones dreams about Kane topping her. Which she does quite well, in a lengthy scene including a variety of toys and bondage. And just when the tape should be over, Jones "wakes up" and engages in a conventional lesbian scene with Kane. Not a bad bonus at all.