Man Koon Brewery is a century-old soy sauce maker in Foshan. The motto of patriarch Man Kai-shan (Hugo Ng) and his wife Tsik Tak-yung (Mimi Kung) is “Male succession and keep it in the family”. However, because of a contaminated soy sauce incident, they just have to let two women, namely, Ha Siu-moon (Rebecca Zhu) and Ip Sai-yiu (Katy Kung), join the business. The duo and their son Man Cheuk-fung (Matthew Ho) become fellow apprentices. Junior master Wah Ko (James Ng) gets involved with the trio, resulting in an intriguing foursome. Meanwhile, everybody gets anxious as certain secrets about the Mans are revealed and Cheuk-fung is abruptly taken away. At the brewery, Kai-shan’s younger brothers Kai-shek (Timothy Cheng), Kai-tsun (Gary Chan) and Kai-kong (Tsui Wing) want to divide the family fortune. And even outsider General Ko Shiu-wing (Andrew Yuen) is plotting to get his hands on a piece of the pie. With a 100-year history, Man Koon Brewery’s future is in doubt as it gets into such a precarious situation.

Encouraged by the fireman leader Chung Yau-sing, young and playful Fong Lei-on joins the team and gets to know Cheuk Pak-yu. Unfortunately, the two of them are having lots of misunderstanding at work. Lei-on believes that Pak-yu has stolen Yau-sing's lover, fire department clerk Ko Wai-ying, and causes the serious injury of Yau-sing. Meanwhile, a gruesome fire accident has drawn everyone into a twist of fate that has led them to find a deeper sense of awareness.

Everything was going well for Ah Bo until recently. After graduating from college, she decided to open a shop with her long-time boyfriend, Ah Jun, thinking that she would eventually marry Jun when everything has been set up and running smoothly. One day, Bao met her old classmate Kei Kei. Kei Kei decided to steal Ah Jun for her own, not caring about Ah Bo's feelings.