Isabella, the daughter of the noble York family, is enrolled in an all-girls academy to be groomed into a dame worthy of nobility. However, she has given up on her future, seeing the prestigious school as nothing more than a prison from the outside world. Her family notices her struggling in her lessons and decides to hire Violet Evergarden to personally tutor her under the guise of a handmaiden.
At first, Isabella treats Violet coldly. Violet seems to be able to do everything perfectly, leading Isabella to assume that she was born with a silver spoon. After some time together, Isabella begins to realize that Violet has had her own struggles and starts to open up to her. Isabella soon reveals that she has lost contact with her beloved younger sister, Taylor Bartlett, whom she yearns to see again.
Having experienced the power of words through her past clientele, Violet asks if Isabella wishes to write a letter to Taylor. Will Violet be able to help Isabella convey her feelings to her long-lost sister?
作为守护重要之物的交换，我卖掉了我的未来。
仅允许良家子女就读的女学园。
对于与父亲交换了“契约”的伊莎贝拉·约克而言，这个绽放着白色山茶花的美丽地方，简直就是牢狱……
在失去了对未来的希望以及期待的伊莎贝拉面前，出现了是被雇来当教育员的薇尔莉特·伊芙加登。