A thousand years have passed since the great ancient kingdom suddenly fell to ruin for reasons unknown and became the ruins known as the Mortal Land. It is said that four weapons had become the keys to the kingdom’s destruction. Meanwhile, a young boy is left all alone in the midst of political strife and conflict and is fleeing from his enemies while clutching the sword Winterer, his house’s treasure that was passed down to him, in his hands. The hidden powers lurking inside the sword reach out to control the boy as he struggles to survive. In the end, he has no choice but to race toward the future in order to beat back the harsh winter that glooms over his childhood. Eventually, he meets a secret society that is trying to succeed a lost civilization and is greeted with their truths and lies. Whose fault is it that the shining legacy they inherited has disappeared? Will the boy manage to find the narrow path he must walk in the midst of his enemies who come to challenge him and his saviors offering him their hands?