Han Xu was an agent sent by the Northern Liang Kingdom to Southern Chu. He lurked for ten years and became the deputy envoy to the Privy Council of Southern Chu. Beiliang asked him to steal the Nanchu border defense map, and he did get it, but he didn't hand it over - because he married a wife and had children in Nanchu, and it was already his home. War between the two countries was imminent, and he was suspected by both countries at the same time. Beiliang called him a traitor, and Nanchu wanted to arrest him for details. If he wants to take his wife and children away alive, there is only one way - to betray both countries at the same time.