Lu Di Jian Xian is a 150-episode ONA that mixes action, comedy and fantasy. Its narrator is a sword immortal who claims a place at the very top of the immortal ranks, with an ancestor named An behind them. The world holds three million sword immortals, and all of them are said to lower their heads in this figure's presence. The sword immortal's stated duty is to put down every enemy under heaven, and the boast ends with a challenge: who dares call themselves invincible or unbeaten?