The adventure of the young orphan Xin continues as he strives to become a great general in the quest of the Kingdom of Qin to achieve the unthinkable—to unify China.

Xin's story begins when his friend Piao, also a war orphan, shares the same dream of becoming the Greatest General under the Heavens. Piao offers himself for a position at the capital’s court and leaves Xin behind to train on his own, with the promise that he will meet him there one day.

One fateful night, Piao returns bloodied and on the brink of death, his final words urging Xin to meet a boy who looks exactly like Piao. However, this boy is no ordinary child—he is Ying Zheng, the king of Qin! And assassins are on his trail!