Like other animated series produced at the time by the Warner Bros. animation, Histeria! derived most of humor from its slapstick comedy and satire, with the distinction of combining historical figures and events. Episodes would commonly feature a large cast of children and typecast adults in comedic skits and song parodies, e.g. the cause of the American Civil War sung to the tune of The Brady Bunch theme.
The Legend of Qin follow through the Qin dynasty time when the Emperor of the Qin, King Zheng conquers the other 6 nations and unified the whole of China to the rise of the king of Western Chu, Xiang Yu, who capture the capital city, Xianyang.
The story circle around a young protagonist, Jing Tianming who carries the blood of a hero turning from a weak and ignorant young boy into a great hero, who single-handedly changes the process of history.