Prime minister's disapperance and attacks on his successor Ai Xin forced special agent Qiu Mo Yu to hide the girl in Dragon Gate, a lawless ghetto where underworld dwellers do business and residents protect their own. Her boyfriend Zhou Huai An followed her there soon after. As reward for their whereabout increased, they became luring targets for every bounty hunter in town. Although Dragon Gate boss, Jin Xiang Yu, gave them sanctuary, they couldn't determine if the woman was their ally helping them to uncover the plot behind the attacks or working for their enemy to trap them in Dragon Gate.

Detective Ji Bai has to train a new recruit, the criminal profiler Xu Xu. Although she is great at determining one's thoughts, she doesn't know how to interact well with people. But that's not the reason why Ji Bai intend to fire her. She's very talented in the art of profiling, yet lacks in physical ability, running as slowly as a snail. Still, impressed by each other abilities, the teacher-student pair slowly fall in love in the midst of their investigations.

Adapted from the novel “When A Snail Loves” (如果蜗牛有爱情) by Ding Mo (丁墨).

Police Officer Enami Atsushi was a capable detective with MPD’s First Investigation Division. For a certain reason, he was demoted to Okutama Police Station’s Mizune Police Substation and is now well-liked and known to the local people of Okutama as “Chuzai-san.”

This drama depicts positively about various kind of marriage forms between the characters: a normal marriage, divorced couple, remarried couple, common-law marriage, and cohabitation couple. Heo Gap Dol (Song Jae Rim) is an unemployed college graduate who has been trying to pass the civil service exam for years. His longtime girlfriend Shin Gap Soon (Kim So Eun) supports him by doing several part-time jobs in the hope of him finally passing the exam and proposing to her.

The story takes place in a Southeast Asian country. Many years ago, a cold case that remains unsolved to this day involved Song Yang as the sole survivor. He became the only witness to the case, while his grandfather, Song Zhao Lin, was the victim. For over a decade, Song Yang has been searching for the whereabouts of the killer.

Late one night in 1938, Wei Yijie, the secretary of the CPC Provincial Committee, announced to everyone that an important incident had just happened: Wen Yijie (Tian Xiaojie), the chief of the organization, seized the top secret documents describing the situation of the Quan Nan Communist Party underground and defected. Provincial Party committee decides to send Comrade Huang Qiuying of provincial Party committee member immediately (Wang Yajie is acted the role of), compose 4 people special action group, rob before Wen Yijie capitulate Japanese intercepts him, retaken top secret archives. This operation was codenamed "Operation Nighthawk". Xu Wenxiao of a member of action group arrives before tieling, fall into the trap that Japanese spy organization special high class sets below carelessly. Cunningly and murderous Japanese special high class Tian Zhongzhi Tai in Za is informed innerparty Wen Yijie incident and provincial party committee already carried out "nighthawk action", make an oath to want to round up "nighthawk" first, take top-secret archives. Japanese plot of one after another opens curtain, Huang Qiuying and money Guanglai (Hou Yong is acted the role of) wait for danger to the wind, battle of wits with Japanese brave, prevented the surrender of Wen Yijie successfully. Eventually, the top-secret files were recaptured and the lives of thousands of underground party members were saved.

Former police officer Asahina, a lighthearted young man, works for a security company. One day, he is appointed as a bodyguard and makes a team with middle-aged Ishimaru. He is a former company president labeled as coward for his cautious personality. Being opposed to each other; however, they undertake the task of personal protection together and come face-to-face with their past.

Set in the Shanghai Bund in the 1940s, it revolves around a female detective who solve multiple cases.

A Chinese remake of "Miss Fisher's Murder Mysteries".