Lady Elizabeth has her engagement annulled at a party by the crown prince, whose heart has moved on to another young noblewoman. She is then imprisoned in the dungeon over unjust accusations, and learns she has been betrayed by the country to which she has devoted everything…
At the peak of her frustration, Elizabeth finally decides to defect, with a grimoire holding hidden and formidable powers in hand!! She begins her new life and trade with the help of Viscount Lucas from the neighbouring country. With a fierce desire for revenge against her home country in her heart.

他の令嬢に心を移した王太子から、パーティーで婚約破棄を告げられた公爵令嬢・エリザベート。そのまま不当な咎で牢屋に幽閉されてしまい、すべてを捧げてきた国からも裏切られたことを知る……。
ついに我慢も限界に達したエリザベートは、強力な力を秘めた魔導書を手に、亡命を決意!!　隣国の子爵・ルーカスの手を借りて新たな地で新生活＆商売を始める。祖国への凄烈な復讐心を胸に秘めながら――。

『婚約破棄』×『投獄』された美しき公爵令嬢が、最強の魔導書を手に『人脈・経済・武力』を操って裏切者に爽快ざまぁ三昧！！！！！