Fatal Journey is one of the side stories of The Untamed. In this movie, we get to see the brotherly relationship between Nie Mingjue and Nie Huaisang as well as learning about the Nie clan's history. The story in this movie would explain a bit on some of the events that took place in The Untamed. The events in this movie happened somewhere in the middle of The Untamed. I think it is best to watch The Untamed first, followed by Fatal Journey.

I would say that the content of Fatal Journey is quite heavy. At times, I need to pause the movie so that I can absorb what was happening. Fatal Journey is not as scary as The Living Dead (another side story of The Untamed) and has less jumpscares. There were one or two gory scenes but the level of goriness is quite low, just to take note.

The acting is good. Their emotional scenes may make you cry, and they delivered the mood/atmosphere appropriately. Since there are a few intense battles in this movie, do expect screams while they are swinging their swords. They screamed often for the movie to be more intense and a bit dramatic.

The music is also appropriate. There were no music or songs that sounded out of place for a historical drama like Fatal Journey.

I would rewatch this movie often by its own (without rewatching The Untamed first). The story is interesting and always remain relevant in the context of The Untamed. There are little to no negative feedback from me regarding Fatal Journey that prevents me from rewatching this movie.