This film tells about the twists and turns of the lives of four lovers who must each overcome different fears and problems as they face the beginning of a new year. The four pairs consist of Ji Ho and Hyo Young, Jae Heon and Jin Ah, Yong Chan and Yao Lin, and Rae Hwan and Oh Wol.

A detective investigates a forgery ring in historical Korea. In the 19th year of Jeonjo’s reign, Kim Min, Joseon’s top detective, who used to be a King’s secret messenger, has been banished to a remote island for some unclear reasons. The only visitors are his old partner, Seo-pil and a young girl, who comes every day to ask him to find her younger sibling. In the meantime, Kim Min happens to hear a rumor that bogus silver bars have been being distributed, which awakens his dormant traits as a detective. Hisako, a beautiful, mysterious woman with her identity unknown, continuously interferes the investigation conducted by this excellent pair of detectives.

Some may dream of, some may be afraid of, some may look forward to, and some may want to avoid THE NIGHT BEFORE MARRIAGE! 4 different couples disclose 4 different stories all about marriage.