Follow the adventures of Kiana Kaslana, Raiden Mei, and Bronya Zaychik along with their friends and foes as they confront the calamitous forces of evil called the Honkai and the Herrschers that lead its Will to unleash terrible destruction upon the Earth. The trio are a group of Schicksal Valkyries from Saint Freya Academy who must work with their allies leading the charge against Honkai such as Anti-Entropy along with their enemies the World Serpent to put an end to the everlasting power of the Honkai.