No one can imagine that the beautiful and lovely an Xiuzhi (Jin Hena) is unexpectedly a senior intelligence officer with six years of work experience. In view of the professional sensitivity, Lian Xiuzhi's boyfriend Li Zaijun (Jiang Zhihuan is acted the role of) also does not know the true identity of his girlfriend, so there are many misunderstandings between the two. Even when Jun was about to study in Russia, Xiuzhi still had no time to catch criminals, and their relationship came to a standstill. Three years passed quickly, and Jae Jun, who returned from Russia, is now an international accountant, and his real identity is also an intelligence officer. He made a lot of mistakes shortly after he joined the profession, when he was ordered to return home to investigate a Russian gangster. By coincidence, he met Xiuzhi disguised as a cleaner. Two people do not know each other's identity, let alone that they are carrying out the same task.