Seven years ago, war reporter Shen Ruozhuo's lover Lu Zhi'an disappeared out of thin air, leaving only the words "Wait for me".
Seven years later, she reunited with him at the National Security Bureau's celebration banquet. He was wearing a uniform and covered in dust, and he looked at her with restrained and distant eyes. The former lover is now the head of the Counterintelligence Division of the National Security Bureau, codenamed "Glacier".
An accident caused her to be involved in the espionage investigation of the "Cobra" organization, and also brought her gradually closer to the Lu Zhi'an she had never really understood. It's not that he doesn't love, but he has used his seven years of anonymity to guard the lights of thousands of families inside and outside the national borders. And her lens is focused on the smoke and the truth - they are each walking on the tip of a knife, but they are always moving in the same direction.
From border gunfights to overseas pursuits, from laboratory suspicions to the ultimate showdown on the eve of National Day, they work side by side and escape from death time and time again. When she was at risk of losing her memory due to old injuries, he stood by the hospital bed, holding a faded Polaroid: "It doesn't matter if you forget me, we can get to know each other again."
This is the story of two guardians. One is guarding the country, the other is guarding the truth. And after a long period of guarding, they finally waited for each other.
