In 1633, the Tokugawa shogunate issued an order to close the country. After that, children of foreign descent were discriminated against by local people without exception. A Shui, who has blue eyes, is a mixed-race child. In order to protect her, her mother asked her to hide her gender since she was a child and hide in the house to avoid harm. Unexpectedly, A Shui's mother still did not escape the fate of being killed. A Shui, who became an orphan, suffered from bullying by the villagers until one day a meteorite changed his (her) fate. A Shui helped the blind old man who forged the knife to transport the meteorite back home. From then on, he lived in the old man's home and learned how to forge knives and swordsmanship. Over the years, the frail boy grew into a graceful swordsman. He bid farewell to the old man, took a samurai sword made of meteorite iron, and embarked on the road of revenge against the man who abandoned his mother and himself. It was snowing heavily, and the fate of many people would change because of this...