A story that follows the romantic entanglements between the experienced head of the major crimes division and a young quirky screenwriter. Zhou Yuan is the head of the major crimes division of the police department. During an undercover operation to catch a drug dealer, he inadvertently crosses paths with Bai Xiao Lu. Her impulsiveness almost causes the entire sting to fail. Upon graduating from school, Lu Hao requested to be transferred to major crimes division to fulfill his aspirations to become a good police officer. However, Zhou Yuan's parenting tactics at work often result in tension between the two. Zhou Yuan and his ex-girlfriend Lin Yao were having problems in their relationship. By some strange arrangement, he moves into Bai Xiao Lu's home thus beginning a co-habitation between two quarrelsome individuals. At this time, Xiao Lu's good friend Yuan Ming Qing starts falling for the simple and earnest Lu Hao. As the case progresses, the two couples grow together to learn that they are each other's answer.