In the distant future, humanity has abandoned Earth to live across the vast expanse of space, joining the interspecies collective known as the Space Federation. In response to this shift, the Soviet Security Force (SSF) was established to secure humanity's presence throughout the galaxy. One of the SSF's many divisions is the Special Armored Company (SAC) #101. Utilizing powerful mobile humanoid weapons called "Armored Knights," these female enforcers deliver justice to corrupt officials, crime lords, and other villainous forces that threaten public order. Soukou Kijo Iris follows Iris Rebel, a lieutenant in SAC #101, as her squad investigates reports of trafficking activities on the planet Left. After her Elven partner, Mei Li Naceri, suddenly goes missing in action, Iris narrowly escapes an ambush and loses consciousness. Captured by Orcs and taken to an underground slave auction, she is thoroughly humiliated by gleeful bidders before being sold for an exorbitant price to Bozuk, the owner of Dark Town's most renowned brothel. Now forced into a life of prostitution, Iris must attempt to find her partner before the pleasures provided by her clients drive her to the brink of insanity.