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As the gears clicked, the numbers on the wheel gradually became fixed, "one four one four two one three". Zhang Fei stared wide-eyed and asked Li Goudan, "What's the use of this?" Guan Yudan closed his eyes slightly, stroking his long beard and said nothing. Liu Bei looked at Li Goudan with affectionate and expectant eyes, "Would you like to explain it to us?" Li Goudan smiled lightly and said, "The difference engine is very useful!"

Sharon, a star master who failed two hundred and fifty-five missions and ruined more than three hundred star satellites, met Lin Si, a mortal who called himself the "Dragon Slayer Warrior" in a low-level world. Will Lins become another unlucky guy, or will he become the lucky one who reverses his fate...