The Dang clan of Sacheon, once renowned for its poison and hidden weapons, is now on the path to its demise. That is, until Yeonmyeung Dang, an outcast boy of the clan, awakens by recollecting the memories of his past life as the 'god of swords' who devoted his life to mastering the sword. Will the boy be able to protect his family and fulfill his dream of living a normal life?