"Hide" is a suspense/thriller based on a tv show called "Keeping Faith". I didn't watch the original tv show, but I can say for sure that this version just didn't work.
It tells the story of Moon Young, a successful lawyer, who's married and with a child, life couldn't be more perfect but out of the blue, her husband Sung Jae goes missing and after that, the police finds his body in a burning car, with a suicide letter. Moon Young doesn't believe that and starts to investigate what her husband was doing the days before his death and what she finds, makes her overthink everything in her life.
Sung Jae was lying to Moon Young all the time, doing illegal things and even cheating on her with Yeon Joo, their neighbor and their daughter's teacher. We discover that Moon Young's father stole the identity of Yeon Joo's father, living his life and Yeon Joo did everything for revenge.

I love Lee Bo Young, she's an spectacular actress, but it feels like the drama didn't want her, almost like she was forced to be there. Her clothes were ridiculous, too big and didn't fit her right and the character development was laze. Basically all the characters are shallow, none of them really stand out, neither did the story.
One really big flaw of the story is not show the change in Seong Jae, from a good family man, to a person like that, who would do anything for money.