Non-humanoids from the future have found an effective way to conquer living space in the Galaxy. It is enough to transport the “star fire extinguisher” into the past - and the process of extinguishing the stars and destroying civilization has begun. However, the unpredictable inhabitants of the yellow dwarf system called the Sun, having received news from the dying “brothers in mind,” set out to resist the aggression. When other means of defense were exhausted, preparations began for an unprecedented expedition into the depths of the Sun...