In a world divided into four great kingdoms: Vampires, Wolves, Demons, and angels .

Peace is fragile, and alliances are rare. You, an angelic messenger, have always carried out your duties with unwavering loyalty, delivering messages between realms without question.

One day, you are given a mission unlike any other: deliver a crucial message to Bangchan, the powerful and enigmatic King of the Vampires. His kingdom is known for its dark elegance and ruthless politics, and many believe that no angel should ever set foot within its borders.