Zhao Yun or Zhao Zilong is legendary general from early Three Kingdoms period of China. He was best sidekick and advisor for Liu Bei and had since accompanied him on most of his military exploits, from the Battle of Changban (208) to the Hanzhong Campaign (217–219).

Mankind is forced to live underground after a giant alien descends upon our planet. After spending years below, a team of braves a finally ready to head back to the top and fight for their planet, with a secret weapon that has been years in the making.