餐廳經理Jill（林嘉欣 飾）一直是志安（胡兵 飾）的後備情人，Jill為了愛情，只好默默守在志安的身邊。 Jill的合夥人Jason（曾志偉 飾）快要退休，找來了廚師Jack（鄭伊健 飾）接班。剛開始Jill對這位新合夥人好感不大，認為他也叫自己的愛人傷心。但經過了解才知道，原來Jack的女友Grace（陳文媛 飾）也跟志安一樣一腳踏兩船，Jack跟Jill一樣都是後備情人。

兩個有著類似情感經歷的人，在互相扶持的過程中對彼此產生了感情。兩人的關係將要進一步發展的時候，志安卻想專一對待Jill……

　　餐厅经理Jill（林嘉欣 饰）一直是志安（胡兵 饰）的后备情人，Jill为了爱情，只好默默守在志安的身边。Jill的合伙人Jason（曾志伟 饰）快要退休，找来了厨师Jack（郑伊健 饰）接班。刚开始Jill对这位新合伙人好感不大，认为他也叫自己的爱人伤心。但经过了解才知道，原来Jack的女友Grace（陈文媛 饰）也跟志安一样一脚踏两船，Jack跟Jill一样都是后备情人。

　　两个有着类似情感经历的人，在互相扶持的过程中对彼此产生了感情。两人的关系将要进一步发展的时候，志安却想专一对待Jill……

Restaurant supervisor Jill (Karena Lam) has a handsome boyfriend Chi On (Wu Bing), but she is just his backup girlfriend. She knows she is the other girl, but her hope for being his one and only has never ceased until he changes his formal girlfriend once again. All her anger goes to her co-worker Jack (Ekin Cheng), who appears to be a womanizer but indeed shares a similar unfortunate romantic situation of being the backup boyfriend of an airhostess. Knowing that both are victims in romantic relationships, Jack and Jill no longer spar with each other and a liking between them start to develop