Two Angels have been 'thrown' to earth as punishment for their wrongdoings in the Heaven. In order to resume their angel status, they were each given a special assignment. One of them has to pair up 100 singles and the other has to break up 100 happy couples. They are cast onto earth as lawyer, Song Jing Jing and social development worker, Song Xing Xing, and the most interesting part is that they have to accomplish their tasks within a specific time frame, so they can return to Heaven again.