The future. Humanity has finally grown to high moral principles. There is peace everywhere and violence is prohibited and eradicated. But what to do when the crew of a ship far from home finds itself in a situation where force is necessary? And none of the people know how to kill, he has never encountered such a situation. Then a person is selected, and the ability to pull the trigger is downloaded into his brain, and how it should be done, as well as all the information that humanity has accumulated throughout its history, when it knew how to fight...