In the past, Su Yingqian was the "lightbulb" between her sister Su Yingtao and Su Yingtao's boyfriend Chu Weichen. In the past, Donna was the young girl Jian An accidentally pushed into the river and escaped, causing occasional severe headaches. Now, after Su Yingtao died unexpectedly, Su Yingqian and Chu Weichen are still as if they were before, but some changes seem to have taken place. Donna and Jane An, who are both assistants to the CEO of City of the Sky Hotel, are attracted to each other without knowing each other's past relationship. Where will they go from here?
When the dim star gradually approaches the bright moon in the passage of time, when the two stars are attracted to each other but are far apart in the sky, and they are not aware of it, the old friend is gone.