first of all 20 episode was too much for this drama and make it slow
but not slow enough to make me get bored or dropping it
the usual 16 was more than enough and reduce all these unnecessary details
the last five eps. was all about Son Dam bi and investigations more

the acting was great specially son dam bi
and Kang han neul although he is not handsome but really he was brilliant and amazing actor

i've to say the directing was great and made the drama rich
i hated so much the FL character i found it annoying many times and i saw her weak, selfish towards the ML
every time she concedes easily and said let's break-up

even when she had the choice, she conceded him easily without trying to convince her son by time
i liked the ML character so much and i saw what happened to him really unfair from the FL
and they kept telling the ML stick to her
don't leave her
bear her ..... what about her guys ??? isn't she had to do the same ???
And she Deprived him from being a father
for the first time i supported what the ML's mother did to her
she was really unfair and selfish

i saw the psychological part wasn't convincing
because the killer was insisting to hurt the FL although she didn't humiliate him once
and told her i'll kill every one around you with no logical reason
and at the end, he just left her ???????????????????

for me the end was a little flimsy and lukewarm

but the ML's romance was really amazing and delightful which made me keep going on watching ^_^