A story that tackles the life experience and mental issues that plague the PTU officers from the perspective of a former undercover cop who returns to the force. After successfully bringing down the triads, Gao Jiasheng goes back to wearing the police badge and crosses paths with Sergeant He Huiling and Team Leader Liu Jianhui. The three have their share of misgivings, but learn to build trust and friendship through a series of dangerous missions.

Chung Kwok-Chu is a renowned food critic and an assistant editor-in-chief of a newspaper, Ko Jim Daily. When his son, Si-Hon returns from Canada, Chu is disappointed to find that Si Hon intends to become a chef rather than taking up a professional career. His attempts to guide his son away are thwarted when Shum Bui-yee, a well-known and respected chef, reluctantly accepts Si-Hon as her assistant. Meanwhile, Kwok-Chu struggles to keep peace amongst extended family members.

A story about two brothers of the same mother but different fathers. "Sam" Kiu Tin-seng and Lo Wai-son separate after growing up together. Over the course of twenty years, with major historical events occurring in the background of their lives, the two brothers face different moral life struggles while living in Hong Kong and Macau.

KO TIN SAN an LAW WAI SHUN are half-brothers, same mother different father. Due to fate, they were not only separated into Hong Kong an Macau, but also grew up in different backgrounds that have caused serious conflict between the brothers. Their mother CHOW YUK MUI brought her youngest son WAI SHUN to Macau and lived in a black market. WAI SHUN strived hard to get through all the hardships and challenges with the help of his good friends YIU MAN YING and LONG FEI. Ultimately, WAI SHUN set foot on a successful path in life. Living alone in Hong Kong, TIN SAN took shortcuts in life, he partnered with a gangster KEUNG YUNG from the triad and had an affair with a wealthy girl. His actions broke his girlfriend CHEUK JING's heart. She eventually losses her beauty an possessions.

The organization to which agent C9 Yue Siu-Kiu belongs is eradicated. Lonesome Siu-kiu encounters vegetable vendor Ko Tai-king. After getting married, she takes care of her father-in-law Ko Au, big sister-in-law Ko Ching-lai, younger brother-in-law Ko Tai-kiu and stepson Ko Hei-long, who collectively make up a dysfunctional family. She has become a proper housewife after five years. Siu-kiu’s former partner B3, who had escaped death, abruptly shows up to ask Siu-kiu to help find the culprit behind the demise of their organization. While Siu-kiu is keeping Tai-king in the dark, she simultaneously takes care of her family and carries out spying activities. But she does not perform well in either job. Black Hole, a terrorist group, goes after Siu-kiu as her identity is exposed. To protect her family, she bravely confronts Black Hole. Some shocking truth is also uncovered in the process, forcing Siu-kiu, Tai-king and their chums to engage the terrorists in a duel!

OL Supreme is an TVB half-hour modern sitcom series.