Having lived a sheltered life for most of his years, Luke fon Fabre, the son of an aristocratic family, knows little about the world outside of his home. Aside from his family wealth to keep him comforted, he also has an interest in swordsmanship. When a mysterious assassin infiltrates the Fabre manor and interferes with Luke's training, a hyper-resonance occurs between the two and both are suddenly teleported out of the manor and into the outside world.