About the title
When humans gain the ability to travel through space, they decide to explore other planets, leading to a fatal mistake. In 'Cosmic Sin,' humanity decides to investigate a remote planet, where they encounter a powerful alien race with superior technology and other advantages. Now there is no choice but to fight against a stronger and unpredictable enemy. Meanwhile, the soldiers understand perfectly well: if they lose, the aliens will reach Earth and carry out a genocide there. They cannot allow this, so they are ready for one last stand, hoping to destroy as many extraterrestrial beings as possible.