Small Bo and Chen Yu are a pair of young lovers in the criminal police force. During an operation to arrest drug traffickers, Xiao Bo's pistol went off due to mechanical failure and the criminal was accidentally killed. On the body of the killed criminal, Bo found a photo of a woman. After investigation, Bo learns that the dead man's name was Zhang Han, and that he went to Hong Kong with his cousin Zhang Xin a few years ago, and was wanted by the Hong Kong police for planning to rob a bank. Now, the first time in actual combat shooting a person's life, in Bo's psyche has produced a huge pressure. In order to relieve the pressure on Bo's psyche, the head of the criminal investigation police decides to let Bo take a break for a while.
During the days of Xiaobo's vacation and rest, Zhang Xin has come to the mainland, and the purpose of this trip is to take revenge for Zhang Han. After a lot of meticulous investigation by the criminal police team, the identity of the woman in the photo also surfaced. It turns out that the girl is called Zhou Zhiqing, now in the city's dance academy to study modern dance, Hong Kong rich businessman Zhou Yongtao is the girl Zhou Zhiqing's father. Coincidentally, Zhou Yongtao is bidding for the city's Great Eastern Plaza construction project, and Zhou Yongtao at the same time bidding for his friends for many years Emperor Group Chairman Guo Xinzhai.
Signing the special identity of Zhou Zhiqing, and in order to protect Zhou Yongtao's safety in the city, the captain arranged for Xiaobo and Chen Yu to protect and investigate the case as students of the dance academy. At the dance academy, Bo is arranged by his teacher to be Zhou Zhiqing's dance partner to participate in a dance competition to be held in the city a month later. In the meantime, Xiao Bo discovers that a strange man has approached Zhou Zhiqing, but he doesn't get along without a few words.
The many cases of hooliganism that happened one after another in the academy made Xiao Bo decide to teach self-defense in his spare time. Because he is often with the girls, Chen Yu's heart is more or less uncomfortable. After spending time with Xiaobo for a long time, Zhou Zhiqing gradually treats Xiaobo as a friend she can trust, and Xiaobo also takes the opportunity to learn some things about the relationship between Zhou Zhiqing and her father Zhou Yongtao. On the day of the dance competition, a bidding meeting for the project is held at the same time. At this time, the captain gets the information that someone has asked Zhou Yongtao to give up the bidding before the bidding meeting, or else he will take action against her daughter, Zhou Zhiqing.
On the day of the competition, despite the tight security measures taken by the police, Zhang Xin hid in the screening room of the auditorium and reported the readiness to his boss Guo Xinzhai. The stage was in full swing. The moment she is about to go on stage, Zhou Zhiqing changes the name of the dance she is competing in to "Heart Bridge Lovers". Meanwhile at the bidding meeting, Chen Yu pretends to be Zhou Yongtao's secretary to protect his safety. In front of Guo Xinsai's threat, Zhou Yongtao sees his daughter and Bo through computer surveillance. Guo Xinzhai's plan goes bust, but Zhang Xin does not terminate the operation. In order to protect Zhou Zhiqing, Bo was seriously injured and sent to the hospital.
A month later, Bo recovered and was discharged from the hospital. When Xiaobo came to the airport to pick up Chen Yu, he happened to bump into Zhou Yongtao and Zhou Zhiqing's father and daughter who were preparing to return to Hong Kong. With a complicated mood, Zhou Zhiqing boarded the plane. The moment the plane took off, Xiaobo and Zhang Yu, a pair of lovers in love, embraced each other tightly.