Seven years have passed and the alien monster has broken through the forbidden zone and expanded to all parts of the world. Human beings are no longer at the top of the earth's food chain and have to struggle for survival. In order to protect the interests of the United States, many soldiers were sent abroad to fight alien monsters, but there is little hope of winning the war. Noah, a veteran, received a new order to go deep into the core of the monster to rescue an American soldier trapped there, but the mission was accidental and Noah's communications and transportation were cut off. the teammate is only one kid who has just graduated from the military academy and has no actual combat experience-and his brother is Noah.