Atalanta, the head of an underground organization, is infamous for committing violent acts against nobles. One day, she receives a commission from the Emperor to assassinate the tyrant Grand Duke Lionel Bianca. Atalanta dreams of a future where her and the members of her organization can live a normal life, so she accepts the commission and infiltrates the Grand Duchy to assassinate him… But, why can’t he be killed? Will Atalanta be able to safely escape from the Grand Duke, who is suddenly whispering confessions of love?