The protagonist Xin in the first season is probably Qin's slave. He has a gay friend named Park. They practice martial arts every day and dream of becoming generals who change their destiny. One day, Chang Wenjun (the confidant of Ying Zheng, the king of Qin) saw them practicing martial arts. Because Park looks like Ying Zheng, Chang Wenjun took them into the palace to be body double of Ying Zheng. At this time, it coincided with the rebellion of Qin Wang's younger brother, who wanted to kill Ying Zheng to usurp the throne. As a result, Park was chased by an assassin as body double. Before he died, Park went back to the village to see Xinbei for the last time and told Xinbei to go to a place called Heibei Village. In grief, Xin rushed to the village, where she found Ying Zheng (Ying Zheng knew someone was rebelling and hid here in advance), understood the truth of drifting into the palace, and met the river mink (one of the heroines) in the village. At this time, the assassin who killed Park and the pursuer arrived one after another, and Xin killed the assassin to avenge Park. Subsequently, under the guidance of the mink, the three men fled the pursuers through the village secret passage, and they helped each other along the way and established deep feelings. Xin decided to help Ying Zheng put down the rebellion (the process of putting down the rebellion was wonderful, but it was too complicated to say). After putting down the rebellion, Xin Qiji got his own house, and The Story Of Diu Sim and Xin Qiji lived together, which coincided with Wei's attack on Qin. In order to realize his dream of becoming a general, Xin signed up for the army and met a heroine (superior martial arts) in the army. In this battle, Xin met one of the six generals of Qin, and realized the battle between generals under the guidance of Wang Qide. After the battle, Xin was made a hundred generals because of his outstanding military achievements (he led a hundred people and later formed his own Fetion Team). In the meantime, Xin found that please guide his practice. After the practice, Zhao attacked Qin. In the battle, he was killed by Pang Xian, a brave general of Zhao, and Xin took over war spear from his hand before he died. The status will be raised to 300. After the war, under the auspices of Li Mu, Qin and Zhao made a covenant.
There are probably so many animations in the first season. I suggest you have a look. Skip to the second season and you will feel that there are many relationships between people that you won't understand.