Episode 6. Xia Hairong attended a party hosted by Zhao Weiwei's ex-husband in order to successfully get into the drug rehabilitation center and get close to Zhao Weiwei. Xia Hairong had never seen this appearance before. He felt dizzy when he went to the toilet, and even Duan Shiqiang quit. Xia Hairong was discovered because of physical discomfort. Xia Hairong fled in panic, but was dragged away by the man. Xia Hairong tried to hide in a room and was finally rescued by Duan Shiqiang. "Undercover Police Flower" mainly tells the story that in an anti-drug operation, South China police cracked a large transnational drug trafficking network. Under the leadership and command of the provincial department, Xia Hairong, a policeman of the anti-drug detachment, was ordered to be an undercover drug trafficking group. First, she sneaked into the branch of the drug trafficking group and cleverly pretended to be the third sister who rescued the drug Lord in the anti-drug operation of the police. Third sister was very grateful and took her back to the drug dealer's lair. After entering the center of the drug trafficking group, Xia Hairong first provoked the infighting of the drug trafficking group, successfully rescued a drug Lord, who had saved his doctor Zhou Jin, cut off the branches on which the drug trafficking group depended, and forced the drug Lord behind the scenes to appear in battle. During the undercover period, Xia Hairong's fiance Duan Shiqiang misunderstood Xia Hairong, who struggled in an emotional crisis. Finally, the police destroyed this large-scale drug-making and trafficking group that had been hidden for many years and was extremely harmful.