Haekang Ohn, eldest son of a prominent politician, is forced to marry his childhood nemesis Gyeun Sah, eldest son of a wealthy family, in order to protect the karma of their families from a two-thousand-year-old curse. To lay to rest the spirits of their ancestors, the two must also consummate the marriage by sleeping in the same room together. But the night soon reveals that “rest” may not be what the spirits had in mind…