Can a substitute heroine save the world? Charlotte is a low-ranked F paladin with nothing special about her, yet she still maintains a positive attitude, and her only dream is to become someone others admire. Everything changes when she meets the reincarnated hero, Bastion, and they find themselves caught up in a fatal situation.

With no other choice, a goddess grants them a second chance. Now Charlotte, endowed with a powerful but dangerous ability, is the world’s last hope and must set out on an adventure with Bastion's companion, whose soul is trapped inside a magic staff that only she can hear.

Follow Charlotte’s journey through a vast, doomed world as she faces a mysterious evil called “The Buried Tree” that threatens to ravage all forms of magic. Will Charlotte be able to overcome her own fears and complete a mission she never asked for?