In the early 1950s, Long Fei, clerk of the archives bureau of the Public Security Bureau, moved into an old house with the archives bureau. Soon, a series of bizarre and horrible things happened around Long Fei. As a result, many years of gossip about the old hometown bloomed. Long Fei did not believe in ghosts in the world. Through the convenience of living alone in the old house, he should check on the haunted things. With the investigation of the plum archives of the two bizarre murders that occurred in the old home, young criminal police unit Xiao Ke also lived in his old home. Long Fei and Xiao Ke, the two young men joined hands to find out the truth of this murderous home, but did not expect to be involved in a major spy case. It turned out that the last owner of the old house is the former KMT senior official Bai Jingzhai. Bai Jingzhai was responsible for the potential spy network in the region during the liberation, and the top secret services organization that has drawn the top secret is the Plum Blossom Organization. Plum financial trade complex system, hidden operations, members of long-term potential, once the organization has action, they embroidered shoes number, wake up members. The organization is invisible and destructive and is an extremely dangerous spy organization. However, at the beginning of liberation, Bai Jingzhai, the leader of the organization, was secretly reported as a bandit, and subsequently the government was rectified. Bai Jingzhai died, the Plum Blossoms of the Pratt - Plum Aoxue map - whereabouts unknown, Plum organizations, the public security departments are trying to find this map, but did not expect to be Long Fei crooked hit the trail, but also unknown so he Missing burned. According to the clues on the plum map, Long Fei met the second daughter of Bai Jingzhai, Mei Xiang, and then won the trust of the incumbent leader of the plum bloc, former KMT commander Huang FeiHu, step by step into the plum blossoms Inside, becoming undercover. In the plum organization, Long Fei is a valuable dual spy, and Long Fei's true identity is only known by his good friend Xiao Ke and boss Zhao Chu Zhang. This is a dangerous front and no special experience Long Fei, with his own intuition and bold, with the help of friends and superiors, a little closer to the day spent plundering the organization. During the Plum Blossom operations targeting radar stations, Long Fei caught sight of major secrets inside the spy and he knew it was far from collecting the net. Because he did not report to the top, Long Fei can only make his own case, follow the plum organization retreat, and in the process of retreating in order to ensure the overall situation and wounded Xiao Ke. Since then, Long Fei has lost the trust of his friends and superiors, lurking alone in the tens of thousands of mountains in the secret service camp, rely on his faith to support themselves, played a non-black and white days. It is in these days in the mountains, plum network organizations gradually surfaced, shown in front of Long Fei. The top plum group is the five women called "Five Plum Blossoms", the three daughters of Bai Jingzhai - Bai Wei, Bai Qiang, Bai Lei, daughter Huang Fei Huang, and a mysterious woman Zhu Na. The five women who are stamped with plum mark, one of them is tattooed "Plum Aoxue map", the key for the organization of the most critical. Five plum body carrying the responsibility of the back can not afford, without exception, fate.White Qiang always remember father and hatred, but also entangled in the complex feelings with Long Fei, and finally became a pawn of the organization, do not know who died to himself. Bai Wei was trained as a top spy since her childhood. She has been faked forging anonymity until she meets someone who can help her to change the past - Long Fei. But their love has been hovering between right and wrong, hovering between two hostile beliefs. This love is doomed to death as the outcome, Bai Wei with the body of the plum map, and the father of the enemy to die. Bai Lei is the most innocent person, she grew up in New China, the ideal is that when the police catch a spy, but never imagined he is a spy, she emancipated the innate reputation of life, she achieved the ideal, She was a martyr at the expense of the spy. As Bai Jingzhai arranged that year, when the five plum blossoms disappeared, the most ambitious agent Ye Feng finally appeared. Long Fei and Xiao Ke never imagined that such a large spy case could be solved in their hands. Although after some hardships in life they finally won.