He's a prince from Cardinia and she's a princess from Pyrus. With their two countries on the brink of war, the two decide to marry each other while pretending to be madly in love. After spending so much time together, what if one of them starts feeling...feelings? All of a sudden, it's not a love story anymore. Violence begins to occur in their countries, followed by murder. Why is their world crumbling apart and who's M? Will these two royals ever have their happily every after?