Lin Xi, a member of a dockside gang, finds himself unintentionally caught in an intelligence war between the Bureau of Investigation and Statistics (BIS) and Japanese invaders due to a key. Alongside his good friend Li Yunfei, they cross paths with Su Nan, a forward-thinking student, and Zhou Yingqun, an upright and principled BIS agent. As the enigma surrounding the key gradually unravels, it sets off clashes among gangs and sparks nationwide turmoil. Amid the turmoil, Lin Xi, Zhou Yingqun, and Li Yunfei form a profound brotherly bond, navigating through life-threatening scenarios.
Struggling student Zhou Linlin follows a study plan from top student Fang Yuke, earning a spot at the country’s top university. Amid college life, unexpected entanglements and friendships shape her journey, while her enduring romance with Fang Yuke faces challenges that test their love.