In the distant future, humanity continues to expand across the universe, but the mysteries and dangers of space grow along with it. A mysterious signal from a faraway star system shatters Earth's peace and sparks panic around the world. Astrophysicist Lin Yu discovers that the signal may come from an advanced intelligent life form, and that it is approaching Earth. The Earth Federation government launches the Interstellar Defense Plan. Young, brave fighters like Li Ming, Wang Qiang, and Liu Ting quickly assemble and undergo intensive training, ready to face the unknown. When the alien fleet appears, attempts at peaceful contact end in an attack, and war erupts in an instant. Outmatched technologically, Earth gradually falls into dire straits. At the crucial moment, Lin Yu thinks of the Dark Forest theory, turning the tide of the war. In the end, Earth discovers the alien fleet's weakness and successfully counterattacks, winning a temporary victory. But this is only the beginning of humanity's journey through the cosmos. As Earth continues to explore the unknown, it will face countless more challenges and choices. Read Volume Two for the missing chapters.