Ethan Mikhailov never considered himself to be human. And actually, he wasn't, and he hated them. Ethan is a machine, an artificially made, humanoid robot that's brain card was damaged by his maker. Initially (and quite ironically) Ethan was made to aid those in need, but upon being mentally damaged, he was unfit to. Once the machine had awoken for the first time, he murdered his maker, this was because his memory card that was supposed to detect his creator as a father figure, saw him as a hostile person instead. The damage to his card was deemed as unrepairable after he was captured and was ordered to be executed, but Ethan was gone and the guards were dead by the next day.
Its about 10 years later, and Ethan is on the run from his maker's son, who's here to avenge his father's death.