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.