萬國城夜總會「媽媽生」沙靜霞和旗下的石慧瓊、文雅倫、江潔兒、余巧巧感情要好。五女化身午夜麗人各有原因，但都在情路經歷跌碰。雅倫為男友胡志文犧牲一切方知被騙，社團打手志飛冀助她脫離深淵，卻因慧瓊出現令關係變得複雜。潔兒要於花花公子許家華與前同學王俊駒之間做抉擇；巧巧因軟飯王弄得焦頭爛額。靜霞苦候丈夫李青龍出獄，詎料……歡場中勾心鬥角，有人為壓倒對方陰招盡出，加上黑勢力橫行，讓紫醉金迷之地危機四伏。
The Kingdom Night Club “mamasan” Sa Ching-ha and her girls Shek Wai-king, Man Nga-lun, Kong Kit-yee and Yue Hau-hau get along well. Each of the quintet has her own reasons for playing the role of midnight lady. But they all have certain issues in their romantic relationships. After sacrificing everything for her boyfriend Dave, Nga-lun realizes she has been scammed. Wiseguy Cheuk Chi-fei wants to help her get out of this mess. However, their relationship becomes complicated due to Wai-king’s presence. Kit-yee has to make a choice between playboy Marco Hui and her old schoolmate Wong Tsun-kui. Hau-hau is messed up because of some freeloader. Ching-ha keeps waiting for her husband Lee Ching-lung to be released from prison. However … When nightclub people engage in power struggles, they do not hesitate to use dirty tricks to overpower their opponents. Moreover, everywhere is triad territory, and danger lurks around every corner in this place of indulgence and decadence.
