The year is 2027 in MegaTokyo, six years before the Knight Sabers will make their debut. Boomers (artificial humans) are still a relatively new advancement, and the implementation and integration of boomers into society is still a bit buggy -- sometimes fatally so. Whenever a boomer incident occurs, though, there is the Advanced Police, a special force trained to deal with boomer crimes. Leon McNichol is a rookie in the AD Police, and is just starting to become exposed to the horrors and tragedies one finds every day in MegaTokyo. He and his veteran partner, Gina Marceau, slowly learn about the ever-fading line that separates man from machine.

The year is 2032, seven years after the Second Great Kanto Earthquake decimated Tokyo. Now, the city is reborn as MegaTokyo, built from the labors of mechanical beasts known as "Boomers." Originally created to benefit humanity, the mysterious corporation known as Genom now produces Boomers with incredible destructive power as a new type of advanced weaponry, capable of disguising themselves as humans. The AD Police is a new special unit to counter the ever-increasing Boomer-related crimes. Overwhelmed by the sheer amount of crimes and disparity in strength, the AD Police poses little opposition to the Boomers. A mysterious vigilante force known as the Knight Sabers, wearing powersuits more advanced than the military, is the citizens' only hope for protection. Led by Sylia Stingray, Priscilla "Priss" Asagiri, Nene Romanova, and Linna Yamazaki, these beautiful girls take out any Boomer that steps out of line. [Written by MAL Rewrite]

The saga of the Knight Sabers continues as the group tries to find out who or what is behind the recent string of robberies, murders, and Boomer malfunctions which are somehow related to the creation of an advanced artificial intelligence. Furthermore, it seems that the Knight Sabers may be breaking up. (Source: ANN)

In the near future, robot technology has advanced to the point of self-awareness. Under the leadership of the "Black King," machines have decimated the human population and conquered the world. Those who survived the early holocaust have been enslaved for life. But throughout the hardships, a lone hero appears as the savior of mankind. He is Casshan - a fusion of man and machine driven to combat Black King and his forces to the end. (Source: ANN)