Retired king of soldiers Lin Zhan accepts an investor's request to train Shen Yuntang and three other exceptionally skilled but frivolous spirit little sisters. They successfully rescue the leader of the Jiang State and achieve instant fame, but while escorting the alien experimental subject 626 they are intercepted by Lei Sha. After being tempered in mind and character by the eminent monk Tang Wucang, they investigate and discover Gu Changshan's sacrificial gene project, as the opponent wants to seize their special genes. Obtaining exclusive battle armor, they fight bloody battles to destroy the villain's lair, and the girls officially take office as instructors at the bodyguard school.