Casmir Dabrowski would laugh if someone asked him that. After all, he had to build a robot to protect himself from bullies when he was in school. Fortunately, life is a little better these days. He’s an accomplished robotics engineer, a respected professor, and he almost never gets picked on in the lunchroom. But he’s positive heroics are for other people. Until robot assassins stride onto campus and try to kill him.
Captain Clayton Cross and his crew encountered the Kyra, an advanced race of avian carnivores. They fled this first encounter, but the Kyra beat them back to Earth by almost a century. Earth lost the war in just a few weeks. Our cities burned, and billions died. After we surrendered, the Kyra helped us to rebuild, but on their terms, confining us to city centers and building high walls to keep us in.