The core setting of the protagonists Li Qiang and Lin Yue is "Retired Special Forces → City Guardian", breaking the stereotype that "Special Forces are only active on the battlefield". Professional equipment such as sniper rifles and tactical daggers are placed in urban scenes such as hotel receptions, wonton stalls in old towns, and office rooftops, creating tension through the collision of "cold and hard professional" and "everyday fireworks." For example, when Li Qiang locked the target with a Type 88 sniper rifle, Lin Yuezheng was wearing an evening dress and pretending to socialize in the lobby. This kind of "front and backstage" cooperation itself is full of drama.