Set against the chaos at the end of the Sui dynasty, eighteen rebel kings gather at Siping Mountain, waiting for an opportunity to ambush and kill Yang Guang during his southern inspection tour. The struggle for the imperial jade seal throws the heroes of the realm into turmoil, and all eighteen heroes of the Sui and Tang era make their appearances. Li Yuanba is invincible with his twin hammers, while Yuwen Chengdu fights to protect the Great Sui dynasty at all costs. Pei Yuanqing and Luo Shixin take turns fighting bloody battles. The yellow banner of Wagang helps its people evade disaster, and Yang Guang narrowly escapes. By the end of the great battle, Yang Lin, Li Yuanba, and Yuwen Chengdu have all perished in succession. The heroes go their separate ways, while Qin Qiong remains at Siping Mountain to protect the people and restore peace. What does it mean to be the greatest under heaven? It has never been about peerless warriors, but the enduring wisps of cooking smoke rising from ordinary people's homes.