Ancient Korea, 1506. The tyrannical King Yeonsan-gun of Joseon is overthrown by his half-brother Jung-jong, whose reign begins with a blood bath. Over the years, traitors plot against him, sinking the kingdom into chaos. In 1528, frightened rumors come to royal palace, regarding a mysterious creature, known as Monstrum by the peasants.

To-il tutors high school student Ho-hoon, but she soon falls in love with him and gets pregnant. The film unfolds a series of playful happenings when To-il embarks on a journey to find her birth father for the wedding, though she is living with her step-father.

Dong-su, who is tired of living in the city, takes vacation and breaks his leg while riding long distances. Dong-su finds a farmhouse, wandering around a strange country road, and stays there for a few days with the help of In-pyo. Dong-su and In-pyo are attracted to each other but they are not sure about their feelings...

Ha-jun always engross his friends love with his good looks. Min-woo, a close friend who is jealous of Ha-jun, summons a devilish ghost, but the ghost who fell in love with Ha-jun spends a hot night with Ha-jun every day. Looking at Ha-jun who looks happy after all, Min-woo is planning another curse.