Hang Yu, He Yudie, Shangguan Ruiran, Yu Kui, Jin Yuqing, Jing Yanying, and Qu Aolei are very good friends. They are excellent in studies and could have been high-level white-collar workers in large international companies, but they chose to be a special forces soldier because of one thing - they like challenges.
The ECTS special force composed of Hang Yu, Su Senshen, He Yudie, Shangguan Ruiran, Yu Kui and others is a mysterious force, and its members are all selected through layers of selection. Few people know about this unit, which often uses many identities to hide its true identity. It often performs important tasks and is a powerful assistant to the country.