Cordelia Grey, a 22-year-old novice editor with many aspirations visited an antique shop to receive the manuscript for the sequel to the fairy tale novel, "The Princess and the Knight." But she ends up exchanging letters with Prince Archie, a character from the fairy tale, using a book chest she obtained through a twist of fate. To Cordelia, holding a conversation with a novel protagonist is like something that only happens in fantasies. To Prince Archie, Cordelia's advice is desperately needed, since she knows the future of the his world. The two continue sending letters to each other, not realizing how the summer nights are slipping by...