During the Qingli period, in order to avoid wars and maintain peace and stability among various ethnic groups in the Northern Song Dynasty, they trained young spies in the name of Secret Pavilion. After rigorous selection and review, the intelligent Yuan Zhongxin, the beautiful and astute Zhao Jian, Xiao Jing who never kills, Wang Kuan who never lies, Xue Ying who doesn't like to communicate, and Wei Yanei who has a cheerful personality formed six teenagers. The seventh fasting of the secret pavilion. After experiencing life-and-death missions time and time again, the once young and ignorant teenagers gradually grew up. They united with each other and dedicated themselves to defending peace and eliminating the disasters facing Song Dynasty with their blood and loyalty. The bruised and bruised teenagers can finally embark on the road home. They fought for the country and died without regrets. At the same time, they also believe that in the years to come, there will be more teenagers who will fight for their ideals and don't know how to retreat. The world is always lit up by such a boy, that is the light called hope.