After swearing off dating for a full year, Leah quickly learns her new commitment has made her a magnet for men.

Inside a national weather service, love proves just as difficult to predict as rain or shine for a diligent forecaster and her free-spirited co-worker.

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.