8 epsEpisodes8 episodes · 1–8 free here
Free on Back'n'Time
The story
Quick answer: 8 episodes, English original audio, and episodes 1–8 play right here tonight.
A young Taoist descends the mountain for one woman, but inherits an empire, four dangerous widows, and a war with an international cartel. With thunder in his fists and a goddess on his horizon, he'll learn: the underworld has no gods.
But he's about to become its devil.
- Episodes
- 8
- Language
- English
- Free here
- Episodes 1–8
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Questions people ask
How many episodes are there in Mountain Saint, Underworld King?
Mountain Saint, Underworld King has 8 episodes in total. Short dramas run about one to two minutes an episode, so it is an easy one-sitting binge. Episodes 1–8 play right here on Back'n'Time.
Can I watch Mountain Saint, Underworld King for free?
Yes — the first 8 episodes are free to watch on this page, no account and no sign-up.
What happens after episode 8?
Tap episode 9, or any tile with a lock on it, and we hand you over to the official app at that episode. If the app isn't installed yet, you'll land on its store page first. We don't host the locked episodes and we never ask for payment details.
What's Mountain Saint, Underworld King about?
The story section above has the setup without spoilers past episode 8.
What language is Mountain Saint, Underworld King in?
The audio is English. It was added to Back'n'Time on Nov 6, 2026.
Episode 9 continues in the app
You've watched the free part. Mountain Saint, Underworld King carries on in the official app — we'll open it at this episode.
Continue in the official appKeep watching 1–8