If there is a theme that has trod a well worn path in recent dramas, it is the wronged-in-a-prior-Joseon-era-life-reincarnated-to-seek-revenge setup. Certainly, some of the most recent productions have left room to improve on this plot but "Moon in the Day" never approaches doing anything remotely competently.

There's some shoddy special effects during a fire scene.

The flashbacks to Joseon era are tedious and circle over the same plot points repeatedly.

These flashbacks would be more of a distraction if the modern era scenes were any more compelling but, oy, those aren't much better.

The supporting cast is not great. Even the usually reliable Lee Joon Hyuk is cast as a humorless agency fixer and it's not a good fit.

Pyo Ye Jin is somehow supposed to be both an asskicking firefighter and a stereotypical helpless damsel in alternating scenes.

One or two of these flaws aren't fatal. Even all of them together might have made just been annoyances. But there's simply no way that any show can succeed with a lead as badly acted as Kim Young Dae does here. He can certainly crush the petulant, lazy narcissist that present day Han Jun Oh is. But then he's possessed by the spirit of the Joseon era warrior and it is hard to imagine a worse pairing of character and actor than this one. Taciturn? Grizzled? Intense? Nope. Nope. Nope.

So, there's nothing new plot-wise, it's choppily directed, alongside an uninspiring cast and there's not much left that can possibly turn it around for the show. Not recommended.