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On this strange continent, various countries fight against each other. As the protagonist's family, they suffer... A revenge from the dark night is about to unfold.

Sudan's grandfather is a retired physical education teacher. His favorite is collecting swords and other traditional Chinese martial arts. However, due to various reasons, Sudan's father had an accident, and the custody rights were handed over to his grandfather Su Jiting. The death of Sudan's father was an accident, but it was because Sudan's father and grandfather did not get along, so Sudan blamed all his father's death on his grandfather, saying that his grandfather spent all his money on his favorite broken swords, guns, swords and halberds. He did not sincerely help his father, which made his life very difficult. However, the earth's magnetic field changed at any time, and the magnetic field decreased accordingly. The earth's magnetic poles deflected, and the earth's gravity field changed. The earth stopped, half of it was day, and half of it was night. There was a big problem in human survival. Grandpa spent all his life's money to secretly build an underground shelter in his countryside. When Sudan found out, he felt very painful...