This drama had too many flaws the ML had been preparing for 5 years to catch villain but there is no progress until FL came. The criminals are all predictable especially main one every time they came on screen vibe changes like director wanted to announce that they are the one. There was no planning shown for the main villain murders he would just be killing any weak or strong person with zero effort I wouldn't have been amazed if he took over the world, they tried to make him give thriller feelings but couldn't feel anything except of being annoyed.
Drama was really amazing but I couldn't understand one thing Geum Hyuk Soo was not supposed to feel any pain or fear but at so many points it felt like he can feel both.