Chen Jianfei (Bosco Wong ornaments) and Zhong Ni (Jin Gang ornaments) are from single parent families of young police officers, doing things are not mature, coupled with a different character, get along with many contradictions. But Chen Jianfei's father and mother Zhongni fell in love, the more tense relationship between two people, made a lot of jokes. Later, two people through the investigation of crimes to enhance understanding and misunderstanding.