The knight Leonhart Avadonia is serving King Arth Lucifen d'Autriche, commiting countless killing in his name. One day, he murders a noble woman and kidnaps her infant daughter. When looking at her clothes, he realizes that she's a Beelzenia Princess and keeps her, hoping to use her as a hostage one day. Five years later, he's given her the name Germaine and takes care of her as his own daughter, thinking her to be foolish child, not knowing the man she calls dad killed her parents. One day, he's approached by the Marlon Espoinage Task Force that has come to take the princess and use her political leverage. Leonhart considers giving her up, but when Germaine draws a blade to protect him, he changes his mind and fights of the Task Force and decides to officially adopt Princess Zita Beelzeni