Plot
A detective takes on a murder case that was disguised as suicide and becomes obsessed with solving it. But his younger sister falls in love with a man that is somehow connected to the murder. The detective tries to push the two away from each other, because he knows the man isn't a good person but the young woman has sympathy for him.
Where to watch The Smile Has Left Your Eyes?
The Smile Has Left Your Eyes is a crime show featuring Seo In-guk and created by Song Hye-jin.
The Smile Has Left Your Eyes is currently streaming for free (ad-supported) on Rakuten Viki and it's also available on Rakuten Viki.