Reborn into an ancient world filled with sword energy, he was adopted by an assassin master. Don’t be surprised to discover that the martial arts in this world are more prosperous and thriving than he imagined. From high-ranking officials and nobles to ordinary people in the jianghu, all have martial arts by their side. In order not to become medicine residue that others can easily grab to practice their skills, he painfully practiced martial arts – acupoint striking, qinggong, mechanisms and traps, palm techniques, sword techniques, inner energy cultivation. Although endowed with astounding talents, he remains as steady as an old dog. Reborn into this world, he doesn’t seek an exciting life, just a peaceful one where he can live to a hundred years old. Suddenly one day, a young female imperial guard was ordered to go undercover by his side, becoming his partner…