A secret can change the most beautiful and important day in someone's life...

But the most beautiful words can change the most painful and sad moment....

In a world where South Korea has a monarchy, Luna, the princess, is getting married Onew, the prince; their parents had arranged their marriage since they were born, Luna fell for Onew first their feelings grew and they both considered each other the love of their lifes, their last love.

Their wedding is over and they're celebrating in Luna's house on top of a cliff that's next to the sea, everyone dances happily, everything is joy and happiness, but the secret their parents hid from them will change what was supposed to be the best day of their lifes.