Siburyus was once a peaceful planet and it never happened wars. Life went on in a regular way, until the alien body was captured by the alien body. It is necessary to save the population from belligerent invaders. The elite unit Saving Syberious is sent to the defense and you are with him. Now the welfare of Siburius depends only on your ability to conduct combat operations in outer space. To begin the military operation, it is necessary to start to rescue two insurgents who miraculously survived. Make your way through the narrow corridor of the underground passage and fight with dangerous monsters hiding in the dungeon.