A suitcase was washed up on the shore by the lake, and a secret marriage agency was exposed, and a couple's strange marriage was also caught in the vortex of the incident. The drama is adapted from the novel of the same name. The story is based on a temporary marriage service. After the failure of his first marriage, Jung Won (played by Gong Yoo) met his second wife In Ji (played by Seo Hyun Jin) through a temporary marriage service. Jung Won is In Ji's fifth husband met through the service. The relationship between the two was shaken when the trunk was found in the lake... Gong Yoo plays "Jung Won", a music producer who is eaten away by the pain of his past experiences and feels uneasy and lonely. Seo Hyun Jin plays "In Ji" who works at a temporary marriage service company.