I don't buy it that the male psychiatrist (Dr Hwang) had no idea what was going on. I think he is at least an accomplice. Why would he not just go to the police with his information rather than make a call from a public phone and then wait around to get called up? Like he was distracting them from something...
Cliche, repetitive, very little/no character development. Same plot lines just repeating again and again. Dropped story threads with no explanation. I really can't understand the praise this drama is getting but then I guess things are just like that sometimes.