Despite its interesting premise, the show was overall disappointing. The storytelling managed to be boring which is very strange as the thematic and concept could have been super cool and exciting. The first episode was pretty intriguing with a strong horror vibe but the story became a train wreck overtime with some disconnected storylines and a lot of (over)explanations regarding the plot.

The actors were doing an OK job but were not helped at all by the wonky scenario. Indeed, it was very difficult to understand some of the characters' actions but also in particular to believe in the relationships between them. The bonds formed between the main female lead and the 2 main male leads seemed to become super strong too quickly which also led to some scenes feeling very flat.

Clearly the series is lacking in many ways but still, there are some positives: the foreign actors acting was not atrocious (-which is pretty rare in K-drama universe), the visual FX were suitable, the fighting scenes were quite nicely produced, and Cha Eun Woo with his insane visual is real eye-candy in his role of priest Johan.

This 1st season is more of an introduction with some world building but unfortunately lacks strongly in characters development. Due to its strange pacing, it provides little excitement for the next season.

I would not necessarily recommend this to people unless they like one of the main actors or the main actress.