Philia, born into a lineage of saints, was considered by her parents to be nothing but serious, lacking charm, and a dull child. They subjected her to rigorous training. As a result, she grew into a talented young woman who was acclaimed to possess the greatest power in generations and became engaged to Julius, the Second Prince of the kingdom. However, Julius, after meeting Philia’s younger sister Mia at a party, fell in love with her and unilaterally broke off the engagement, as he wanted to marry Mia. Moreover, so Mia would not feel awkward, he arranged to sell Philia to a neighboring kingdom lacking a saint, in exchange for gold and resources. Sensing growing numbers of demons and foreseeing calamity ahead, Philia warned against this, but Julius refused to listen. Cast out by her parents and even the King, Philia was sent to the neighboring country almost as if she were banished. While she was being hailed as a hero in the neighboring kingdom, her homeland was on the brink of collapse due to the menace of demons.