The film will follow Princess Songhwa, who refuses her fate to marry one of four suitors. While Seo Do-yoon, skilled at interpreting marital harmony signs is selected as the person to ascertain her best match.

Whenever elementary school teacher Kang Joon-soo (Lee Seung-gi) falls in love, he always gives too much of himself to the relationship. Yet despite that, he ends up being the one getting dumped by his girlfriends. Joon-soo has been friends for 18 years with Kim Hyun-woo (Moon Chae-won), a weather forecaster whose beauty belies her witty tongue and aggressive manner.