When I see "FL", I think the implies the actor was bad instead of the character she played. Jang Na Ra did a decent job, but her character came off poorly. It felt like the writer had a thriller in mind and was forced to add in a romantic storyline. On top of that, what could have been an interesting character was ruined by some really ridiculous choices. I finished the series because I found the premise interesting enough to see how that turned out. (I do admit to needing to fast forward through some production inconsistencies)