Chul-Soo is the only son of a legendary thief family. He falls in love with Young-Hee who is a police officer. Her family is also a police family. To get her parents’ permission to marry, Chul-Soo undertakes an exam to become a police officer, but both families work to prevent their marriage.

A woman named Seo Ji-Woo (Im Soo-Jung) traveled to India and met her first true love Kim Jong-Ok. Since that time Ji-Woo can’t forget her first love. She then turns the company “첫사랑 찾기 주식회사” – which means literally “Finding Your First True Love Company” to help track down Kim Jong-Ok. Han Gi-Joon (Gong Yoo) started “Finding Your First True Love Company” and he takes on Seo Ji-Woo is the company’s first client. The pair travel all over Korea to find Seo Ji-Woo’s first love and & in the process Han Gi-Joon falls in love with his first client …

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.