I think the storyline is really good, the writer really puts us into detective mode for the whole episode. And I guess some viewers can't really figure out who the real killer is. In fact, at the beginning of the episode everything is very confusing, because a lot of things look suspicious, but if you pay close attention you will know every detail that leads to the killer who turns out to be a little bit obvious in the middle of the episode.
I recommend paying attention to every little detail in the middle and towards the end of the drama, and if you're lucky you'll know who it is.
Some of the events involving the family in this story made me sad and feel the same way as the characters. The romantic part is not so intimate but I like a light romantic story that focuses on their main goal which is to find and catch the killer.
There will be a surprise at the end of the episode that you never expected. Be sure to watch it all the way through!