Excellently written, directed and acted.
Fab cast who all portrayed their characters so well.
I loved the dynamic between the leads and also the sibling relationship between Hyun-soo and Hae-soo.
The story twists and turns, is gripping, sad, but also humorous at times.
Moon Chae-won's portrayal of Cha Ji-won, I thought was excellent. Her trust in her husband was harshly tested and even though she had moments of self-doubt, she was determined to uncover the truth. She was sometimes vulnerable, but also strong willed and very emotional. I felt she was an anchor for her husband and a massive part if his emotional development. Her investment in him and their family was, I felt, one reason she was easily brought to tears when all might be lost.
The only reason I didn't give a 10 for re-watch value is because being a thriller, I now know what's coming and who's who. However, I would happily revisit it one day.
A definite one to watch.