Stories about happiness and true love often begin with separation. This separation appears in "Ring of the Day". This drama is adapted from the novel "Ring of the Day" by Taiwanese writer Lai Yiwei. The story is set against the backdrop of the MRT and tells the story of Huang Yizhi, an insurance actuary who is meticulous about everything and plans to start a family with his girlfriend Lisa Li, who he has been dating for five years. Huang Yizhi is a certified actuary by the Society of Actuaries of North America. It is rare for people in Taiwan to obtain this certification. Actuaries are very dedicated to their profession and their thinking process is different from that of ordinary people. On the day of the proposal, Huang Yizhi lost her diamond ring while taking the MRT, and a series of absurd and interesting things happened during the search for the ring. And this ring wandered among seven strangers, stringing together seven romantic urban love legends, and finally finding the lost item and the true meaning of love... This will eventually be a happy story. This drama presents seven romantic journeys on the MRT in the form of unit stories: there is a white-collar man and a flight attendant who are hesitant outside the marriage wall and are not sure whether to get married; there is also the implicit love that retired elderly people can't express. The audience is worried about the little fat boy who always fails. Does he have the courage to take on love? There is also a naughty and cunning little boy who helps a single mother's love to be unexpectedly happy; in addition, there is how a college student majoring in insects saves his goddess with the help of a gangster father; a little model full of star dreams escapes from the glamorous world of money and finally realizes the ordinary happiness; in the end, the relationship expert and her husband who are not in harmony with each other make the ring return to the starting point again.