The Machiavellian Knight (Tapa blanda)

A loner find himself with the moral challenge of using his new found powers to change the fate of humanity. He fights tooth and nail against an alien invasion that threatens to destroy everything. On the brink of extinction, humanity toss aside all morality and ethic for the sake of winning the war and saving the species. The Knights, the men and woman who rose to the challenge and became the saviors and only hope of humanity risked their lives against an unknown enemy. Warriors become once again the most valuable members of society. However, their sacrifice might be useless. The worst of humanity shows up to guaranty their own demise. The question arise: who is the monster