Basically, in the future, the world is a bleak and desolate place, particularly for mutants who are being hunted and killed by the all powerful Sentinels (
big evil robots that can take on mutant powers).
Though I will say I was not expecting Susie (Who is the
robot girl with the
big blue eyes and pink hair) to be on the
evil side, I thought she was gonna be a companion to Kirby but apparently not.