August 04, 2021 Lee Ha-na plays the lead role in disappointing procedural K-drama Voice 4. Viu 1.5/5 stars Few things are as satisfying as a well-crafted investigative thriller, whether in the pages of a book, within the dark surroundings of a theatre, or broadcasting to your TV screen every week. A few things hold true for the ones that capture the imagination. Chief among those elements are the investigators through whose eyes we experience the story and the investigations themselves. Ideally, they are interesting stories that are cleverly revealed to viewers as the investigators uncover plot layers, bit by bit. However, these two elements are mutually dependent – without one, the other will not work.