Tang San dies as a master of hidden weapons and is reborn on Douluo Continent in the body of a blacksmith's newborn son. Every inhabitant of this world awakens a spirit at age six; Tang San's turns out to be Blue Silver Grass, a vine-based spirit everyone around him dismisses as worthless for combat. Drawing on his old-life skills and an unusually strong spirit power, he sets out to prove that even a weak-looking spirit can be shaped into something formidable. This web novel is the original source behind the franchise's later anime and manhua adaptations.