Please ignore the MDL rating (8.6 at the time of writing in 2023)!

The very basic premise (time-traveling detective and serial killer) of this story is interesting. But the writers did a great job of destroying the potential. In two ways:
- All the characters are unbelievably stupid, except the murderers.
- The time traveling aspect is not used at all, it is rather a weird fact on the side.

To come back to the stupid characters: do you know those dramas where there is one lead character who always knows everything in advance and before everybody else, just by being super smart and of course they are also the best in every practical aspect? They can get annoying. Well, in this drama you get none of that :) Everybody is just so unbelievably stupid and incompetent it hurts. When a good detective's skills are 100, the average person's detective skills are maybe 10. All the detectives in this drama are a 1. And that's generous! No common sense at all. And they repeat their mistakes over and over again, and drag this very simple story out into 16 episodes. Some examples:
- When you want to catch a suspect, sneak up to them until you are 10 meters away, then shout at them, so they can run away from you without you being able to catch them.
- When you found out in which house a suspect is hiding, go to the house with 4 cars, all with full sirens! Then storm the house from the front without covering the back door.
- When you are a ML in a team of two and a great revelation comes to your mind, don't tell anyone and storm off angrily to get yourself in trouble.
- When you are a weak vulnerable FL, speak to a serial killer in code via TV and lure him into a dark forest where you wait for him all alone to be his next victim. Don't tell anyone of your police friends about it.

Then the time travel: time travel stories never fully make sense and that's fine. But here's a question for you: when you are a time traveling detective, would you try to catch a serial killer when he is young (in the past) or when he is old (in the future)? And as I said, the time traveling aspect is just there, it is not really relevant for the story, it just makes for some confusion and funny scenes. For a better use of time travel in a detective story, check out the K-drama Signal from 2016!

Ignore the bromance tag on this! It lasts two seconds, is super weak and can't save this train wreck.

I guess I should also say some positive things. The acting is generally quite good, except maybe the time traveling lead who has a limited set of faces. And the character development of the FL was a bit too much: for most of the drama she has the facial expression and emotional warmth of a stone and then suddenly in the end she meets a certain person and becomes normal quite instantly.

Ignore the rating and positive reviews and skip this one!