Kdramas with a lot of twists

Hello ^^ Can anyone recommend me some korean dramas with a lot of twists and unexpected events, like a roller coaster, that will make me surprised. i prefer melodramas, or anything else other than rom-com . Thank you =D

woow seems interesting, thank you ^^

Innocent Man ^^ Incarnation of Money & Cruel City are also good

IRIS and Nine: Nine Times Time Travel

Ghost was pretty good too :)

White Christmas..... it's an awesome drama!!

I second The Chaser! Two Weeks will also keep you on the edge of your seat (last two eps will air this week) and if you don't mind a business drama without romance I'd recommend Golden Empire as well.

I second both Incarnation of Money, and Ghost

For movies:
Hello Ghost, I assure you with this one. Although since its a movie, there would be lesser number of twists.