its best thrilling drama, it was first kdrama i never got to bore of in any of episodes of drama, first when i saw it on web i thought it was just a drama but after i watch it has high rating, i watched first episode to see if its good and then until next day i completed whole drama of 12 epi, even though it didn't had romance i really liked lot. Best crime show ever!!!! korean industry is best in thrill and crime dramas. i wish they have another season. i wish other dramas will be like that thrilling, more crime related and short not extending LOVE ACTING. 10/10 for actors and their acting.