ღიმილი რომელიც დაგამახსოვრდა / The Smile Has Left Your Eyes (Haneuleseo Naerineun 1eok Gaeui Byeol)

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.