Mikias, the "Gravekeeper Saint" hated by everyone, escapes from the Saint's Palace that binds her, and dreams of freedom, busily saving money.
However, everything changes on the day she is suspected of assassinating another Saint, and the ruthless Prince Riddle proposes a "fake marriage" to achieve their mutual goals.
"It's not affection or love. I have no intention of taking anything away from you."
In order to be free, Mikias becomes a fake fiancé, but...