Kim Chunchu is the grandson of King Jinji, but when his grandfather is overthrown, Chunchu is denied the chance to become a successor to the throne of Silla. He later meets Kim Yushin, and the two men begin a friendship. Chunchu later becomes King Muyeol, the 29th Korean monarch who leads the unification of three ancient kingdoms - Goguryeo, Baekje and Silla, while Kim Yushin becomes one of the greatest generals in Korean history.

《大王之梦》讲述了与唐朝一同联手消灭百济，创造民族文化鼎盛期的新罗第29代王金春秋（崔秀钟饰）与金庾信（金有锡饰）的英雄事迹。

우리 역사상 최초로 난세를 평정하고 통일국가를 완수해 우리 민족문화의 최전성기를 이룬 태종무열왕과 김유신 등 영웅들의 일대기를 흥미와 재미로 재조명한 대하드라마.