Cardia is confined to a deserted manor on the outskirts of London as she vowed to her father. She leads a solitary life detached from the world, burdened by a lethal poison that corrodes everything she touches rendering her an outcast to the locals who label her a “monster.” Her tranquil existence is shattered when the Royal Guards raid her abode to detain her. It is then that she crosses paths with Arsène Lupin, an honorable burglar, who liberates her from the grip of the army. Together, they embark on a quest to find her father who holds the key to uncovering the enigma of her perilous affliction.