Yuan Shaohu, who wanted to be a policeman since he was a child, was praised by his superiors and learned that he had been promoted. He happily went home to celebrate with his roommate Yang Qi’an, but found Qi’an left already without saying goodbye. At this time,Yuan Shaohu receives an order from Xiao Qin to help Congressman Yang’s son as a security guard on the wedding day. On the day of the wedding, he discovers that Qi’an, who he thought was an orphan, turned out to be the illegitimate son of Congressman Yang. Congressman Yang wants Qi’an to come back and marry Fan Xiaozhen, the daughter of the chairman of the construction company. Because Congressman Yang was involved in a lawsuit, marrying the Fan family was the last way out.