It take me a long time before I started watching this drama but when I started it... I was hooked from episode 1 and finished it straight up to episode 20 in 2 days.... Every episode keeps you hanging and makes you watch the next episode. Dr. Yoon Ji Yoon was acted well and all the other actors were equally great... The 20 episodes were all worth watching and the final episode wraps it all up... If you're into medical and police stories, this is a must watch drama.. though as a warning this is regarding forensics so expect to see lots of dead bodies and autopsies... Overall, this drama is one of the best that I've seen....