The alien fleet swept across the solar system, and mankind was retreating steadily, finally retreating to the deep space fortress in the orbit of Jupiter. {Lei Gang} was an artillery squad leader in the fortress. During an enemy raid, he accidentally touched the core of the fortress and gained absolute control of the super weapon. Facing successive attacks by the alien fleet, he led the artillery unit to counterattack accurately, cracked the enemy's tactics one after another, and defended the last line of defense of mankind. When the fortress ran out of ammunition and food and fell into a desperate situation, Lei Gang resolutely drove the deep space fortress and crashed into the alien mothership at full speed, buying precious time for the remaining human forces to escape by dying together.
