You are a healthy, smart young man, you still have your whole life ahead of you, you have a lot of opportunities and you look into the future with optimism. But, everything changes at one moment, the whole familiar world around is collapsing and now you have to kill, and, in fact, innocent people, and all because there are few planets in the galaxy similar to ours, another civilization needs to solve the problem overpopulation of their worlds and therefore they just want to take over the Earth.