Secret - 2009 - 6/10
AKA - Sikeurit // 시크릿

A bullying thug is murdered, and his brother is a ruthless mob boss.
As the gang leader searches for the killer, so do the police.
One in particular, a corrupt cop, suspects the killer is his own wife.
The couple have marital problems, and the tears and angst drag the whole show down.
The “plot” is of our cop trying to destroy or mislay evidence.
Then there’s a mysterious blackmailer.
If you stick with this, there are a remarkable series of twists in the final act.