In the 1930s of the 20th century, in what should have been an era of peace that lasted for decades, the continent of Europa fell into war due to the massive invasion of the rising Yurenia Empire. Facing the Yurenia Empire, which has reached a high level of technology and magic, the weak Ik Kingdom obviously does not have enough power to fight against it, and it even seems so weak to resist. The story happened in such a chaotic and dark era. Erica, a girl who is an ordinary cookie maker in the country of Yike, and Betty, her playmate who grew up together, have to survive in such a world and resist. How far can the ambition of the empress of Yurenia be expanded? Let's go step by step.