She desperately wants to stop and close her eyes for a moment to calm down, to catch herself, but she stubbornly walks towards the captain's tent, not paying attention to the pounding in her chest and severe shortness of breath. Never before in this long year of war had Yongsun felt so tense and frightened as she does now, ten paces and three breaths from her.

In the midst of a brutal war, Chanyeol and Baekhyun who live in the rural countryside, happen to cross paths. 

Upon discovering that a relative of his is alive, well, and in hiding, the fair and young King will stop at nothing to secure his throne. Even if he must kill the very man who has kept him alive and made him want to live.

A runaway, an abandoned city, and eight boys trying to survive. One war led to the fall of it all, and nine boys are trying to put it back together.

Do you believe that it's possible to change a heart made of ice?  Do you believe that you can tame a monster when it's furious?  Do you believe that you can fall in love with a cold hearted Mafia Boss and can boldly confess your feelings to them?  Well in Byun Baekhyun's opinion everything is absolutely possible.

With the war still raging between two kingdoms, an agreement was made, the Prince of the kingdom on defense would marry the King of the other kingdom.  But, the prince was told it was another prince he would marry. I guess that detail just happened to slip.