Kingdom 4th Season

Qin survives the six-state coalition invasion, but the end of the external war brings the struggle inside the royal court back to the surface. Ying Zheng has earned the people's trust through his leadership during the crisis, while Lü Buwei remains his most powerful political rival and prepares to disrupt the coming-of-age ceremony that would give the king full authority. At the same time, a Zhao force advances toward Qin, and Zheng's half-brother Cheng Jiao, once an enemy but now a trusted ally, volunteers to command the response. The enemy's quick retreat reveals that the battle is part of a deeper political trap. Surrounded by court conspiracies and border wars, Zheng relies on the few people he truly trusts, including Xin and the Fei Xin Force, as the contest over who will rule Qin from within approaches a decisive stage.