Abandoned by her father, Arna Hardi lives quietly in her maternal family, Baden. A crisis has come to this small country. After the death of her maternal grandfather, Baron Baden, all of her fortune passed over! Arna, who wants to somehow protect Baden-ga, heads to Schwerin to ask her father for help… There she encounters the royal poisonous mushroom, Bjorn Denyister! The prodigal son of the royal family who even gave up the throne due to a rare scandal! Arna, who wants to protect Badenga, is handed this sweet poisonous mushroom... ! “Miss Arna, don’t eat poisonous mushrooms. If you do, you will die.”