As a successful captain in the military, Yun-a is an icon of success and power. But after an accident on the battlefield, she finds herself trapped in a romantic fantasy novel. Stuck in a supporting role as the best friend to the main protagonist, Yun-a is determined to overturn the plotline and change Rosalie's fate. Will she be able to change Rosalie's fate and find happiness in the new world? Will she return to where she was originally from?