The mysterious world of Camelot is surrounded by the endless ocean, itself bounded by the gravitational frontier that swallows up everything that comes near. The inhabitants of this world have tried to cross this boundary using science and technology, but have failed... As Peiluo, a young knight, escorts a convoy of merchants, she comes face to face with a stone giant! Peiluo demonstrates her exceptional swordsmanship, and her technique reveals similarities with that of a legendary knight: Lancelot!