Kento Yamazaki, who starred in a 3-minute short of the same name released in 2016, reprises his role as the film's protagonist with a supporting cast that includes Ryo Yoshizawa, Kanna Hashimoto, Masami Nagasawa, Kanata Hongō and Takao Osawa.

The film portrays the life of Li Xin, a general of Qin, from his childhood as an orphan through his military career during the Warring States period of ancient China.

One day, Chang Wen Jun visits their village in search of soldiers to aid the king Ying Zheng, but he will only accept Piao.

Some time later, a mortally wounded Piao appears at Xin's house, warning him that Ying Zheng's brother, Cheng Jiao, has started a power struggle and urging him to go to a point marked on a map he gives him.

Ying Zheng's remaining army finally arrive at the summer resort, including Chang Wen Jun, who was previously assumed to have been killed by Wang Qi.

Ying Zheng's army arrives at the royal palace disguised as part of the Mountain Tribe, under the pretense of helping Cheng Jiao fight against Lü Buwei.

Just inside the gates, Ying Zheng initiates an attack, while Xin, Diao, and Bi use the underground passageway to reach the throne room and assassinate Cheng Jiao.

In the midst of this, Wang Qi and his army appear in the courtyard, where he asks Ying Zheng what he will do as king, under the condition that he will behead him if he does not provide a satisfactory answer.

[4] An English-subtitled trailer was screened at SXSW 2019 in March, where lead actor Kento Yamazaki had paid a courtesy call to the vice president of Sony Pictures International.

[21][22] [23] A third film, with the director and much of the cast returning, titled Kingdom 3: The Flame of Destiny (キングダム 運命の炎, Kingudamu: Unmei no Hōno), was released on July 28, 2023.

[24] The fourth installment, Kingdom 4: Return of the Great General (キングダム 大将軍の帰還, Kingudamu Daishōgun no Kikan), was released in Japan on July 12, 2024.