It is a story of a mistress who comes back for her revenge after enduring all kinds of mistreats from her husband's wedded wife. The resentment between two love rivals is passed on to their descents and grows into a war …

Day（小面包饰）和Night（Dew饰）分别出生在闰日（2.29）的正午和午夜，他们是被诅咒之人，每四年一次的闰日不仅标志着自己的诞生，也预示着所爱之人的死亡。

讲述实习生和职场前辈的办公室爱情故事。