Intro. Plot: a coup d'etat takes place in the kingdom of Forland. To avoid falling into the clutches of the rebels, Princess Alita and her retinue flee the castle. But in the mysterious forest of Erure, they are attacked by a mysterious and powerful guardian of the forest. Having lost all her guards, the princess rushes in a panic wherever her eyes look.
Alita tries to ask for help, but a powerful blow knocks the ground out from under their feet, and both girls fall into the abyss. Miraculously landing, they are surprised to discover that they have switched bodies.
Now Faris, who finds herself in the body of the princess, has no choice but to agree to protect the kingdom of Forland. Thus is born the strongest and cruelest princess in history: the Deadly Princess. Some characters: Alita is a kind-hearted, educated and brave princess, but she doesn't know how to fight at all. Faris is a mercenary who once lost her family a long time ago and devoted herself entirely to training and battles. Dr. Akamashi is a power-hungry former royal scientist.