The Cool Country covets global hegemony and secretly plots a dual strike in space and deep sea, attempting to crush the Xia Country with absolute power and seize control of the world pattern. To resist the incoming enemy, the Xia Country urgently launched a defense plan, assembled a top scientific research team, and made every effort to build the "Sky Shield" satellite chain laser defense network. During the research and development process, the scientific research team was repeatedly coerced and lured by the Cool Country's forces, and even encountered fatal schemes such as assassinations and arson, falling into a dangerous situation. In the critical moment, the Xia Country used a substitute trick to deceive the enemy, covering the scientific research team to advance secretly, successfully completing the satellite network, and building an indestructible defense barrier in space. At the same time, the Xia Country secretly deployed a deep-sea magnetic wave trump card, waiting for the Cool Country to step into the trap. When the Cool Country launched a full-scale general attack, in space, the "Sky Shield" accurately shot down all incoming weapons; in the deep sea, the magnetic wave silently destroyed its nuclear submarines. Unwilling to fail, the madman of the defeated Cool Country tried to detonate a nuclear bomb, dragging the whole world to perish together, and the doomsday catastrophe came instantly, putting the Xia Country in a life-or-death test again.