Lilly, a priestess sent to prevent a prophecy that foretold the death of her brother, the heir to Oceanica's throne, from unfolding falls in love with the demon king that is said to be her brother’s killer—and goes even more insane than he is.

Michael, the demon king of Tendu, has long resented the royal family of Oceanica due to the part they played in his father’s downfall—little does he know, his obsession with this priestess might lead to his own.