In the bitter cold, Namjoon, a young man from a small village town overhears a strange rumor regarding a house resting on the northern mountain. It is said in that home there lives a young man whose heart has frozen over. Namjoon, determined to save his sick grandmother, accepts a job there in order to earn the money required for medicine. 

In the cold of winter, a heart freezes, and in the cold of winter, a heart thaws.