1960年代初，深圳口岸。公安勇士李明刚（林岚 饰）捉获了一个被弃置的手提包，内含爆炸物和雷管。侦查分 discover that this bag belonged to local laborer Lin Dexiang's nephew, Lin Yonggui (辜朗晖 饰)。 Arrested on the spot and interrogated, Lin revealed a chilling plan: to bomb an electrical factory before National Day.
Li Minggang decided to use trickery to uncover this sinister plot. He fed false information to secret agents, leading them to believe that he was oblivious to their plans. Meanwhile, undercover agent Xu Ying (红冰 饰) infiltrated the ranks of a cunning operative named Qian Jianren (史进 饰). Xu sought to dismantle the bomb, but Qian had other ideas: he planned to deceive the authorities by altering the target and using his wiles to lead them on a wild goose chase.
Li Minggang saw through the enemy's tactics and began piecing together their next move from subtle clues. As National Day approached, it became clear that the enemy had something bigger planned. The authorities and the hidden foe engaged in a deadly game of cat and mouse, with the safety of the nation hanging in the balance. At critical moments, the enemy hid explosives in an innocuous looking briefcase...but Li Minggang was one step ahead.
The race against time was on as Li Minggang and his team scrambled to save their nation from imminent destruction. But the enemy was always one move ahead, using every trick in the book to stay one step ahead of the authorities. Would they succeed in dismantling the bomb before it was too late? The fate of the nation rested on the shoulders of Li Minggang and his team.
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