The fic is set in a dystopian fantasy-future where just about every aspect of life is controlled by the Color Guard—a fictional republic run by an unnamed leader (later revealed to be an android known under the ego Iris Z.) Many people are unaware of the control...but for some, it's the opposite.
Ruby, Sidney, and Natalia are members of the Wild Ones—a rebel organization dedicated to fighting the Color Guard. Ever since their parents were kidnapped and brainwashed by the Color Guard three years before, they have been plotting to annihilate it. Under the collective alias "BΔHΔRI" (pronounced as "Bahari"), they work in secret in hopes that they can one day achieve their ultimate goal...
...but their hopes are shattered after, one day, Anton—one of the Wild Ones' head spies—gets abducted while out in field.