韦福荣、陈炳基、罗家辉这三个同居客兼好友，各人背景不同、遭遇各异、郄同样有着“男人四十”的困惑……。韦福荣，卅九岁，独身，AW广告公司创作总监，曾经是广告界的风云人物，从事广告 创作的十数年间，屡获本地及国际广告大奖，相信只要有电视机及广告牌的地方，便会有他的广告。陈炳基，卅九岁，独身，尖端补习社校长兼创办人，人称“补习天王之父”。罗家辉，卅八岁，独身，是秋天话剧团的成员暨文书暨打杂暨茶水……也是个戏剧极端狂热爱好者，立志献身戏剧艺术。

三个中年男人，三个好朋友，住在同一屋檐下，一同经历着男人四十的种种冲击与考验，一起尝试从失败中学习成长，但到最后方领悟到，原来最可怕的并不在于年老、失业又或是失恋，而是失去了自我自信，其实丰盛富足的人生只在于四个字─活得精彩！

What do men go through once they hit the big four-zero? What goes on in their minds? What about their lifestyle, does it change? Their relationships, their worries, problems and secrets... This drama is about three men in their forties, just starting to experience and understand their definition of life: issues with women, love, career, and many other relationships in life. Each has a story of their own that interconnects with one another; and an ending that no one can ever expect...