A ship from Earth set off on a long and long space journey to Space Sentry. His path lies in a distant galaxy for research. It was prepared for a long time, a team of scientists of various kinds was formed and prudently equipped with onboard laser guns. It turned out not in vain. Before the ship had time to fly even part of the way, unknown objects appeared on the radar. As they approached, it became clear that these were warships and they were not at all set up for cooperation, which means they would have to shoot, otherwise they would not survive. The expedition must continue, therefore it is necessary to destroy all obstacles in the Space Sentry.
