During the Warring States period in China, danger seems to lurk within the Han State which is seen to be the weakest of the Seven States. It is under threat from the more powerful Qin State while the aging Han King is losing his grip on power due to internal power struggles. The greatest threat is the Great General of Han, Ji Wuye and the Four Fearful Warriors of Nightfall, each specializing in military, finance, politics, and espionage. The Ninth Prince of Han, Han Fei, hopes to create a new world with a stronger Han State which can overcome its internal problems and withstand the pressure from the Qin. He forms Quicksandwith Wei Zhuang, Zhang Liang, Zinü, and Nong Yu, who support the Prince in realizing his goal while helping to combat the forces against him.

Facing the threat of the Qin State, danger seems to lurk within the Han State, which is known as the weakest out of the Seven States. Unknown to the Han Emperor, that very threat is the Great General of Han, Ji Wuye. Working under the Great General are the Four Fearful Warriors of Nightfall. Each four specialized in military, finance, politics, and espionage. In hopes of creating a new Han State, Quicksand was formed by Han Fei, the ninth prince of the Han. With Wei Zhuang, Zhang Liang, Zinü, and Nong Yu, they support the Prince in realizing the goal of Quicksand while being drawn into a whirlpool of power named "world".—MyAnimeList

Nine Songs of the Moving Heavens is a Chinese animated CG TV series which was produced by Robin Shen and directed by Chen Qianyuan. It can also be translated as Nine Songs of the Sky. This series is the prequel to The Legend of Qin, which takes place before the time of the Qin dynasty.