I started this after I saw a lot of people talking about it , I finished this season to find out that it has 2 more additional seasons !!! So basically the story involves around the leads actors when they cross paths and help each other to solve crimes , which apparently helps them to unlock the mysteries of their past. The chemistry between the leads is so good even though their romance was a bit sudden, but I guess their history makes it logical . So overall I loved this drama , loved both their romance and the action scenes . It kinda reminds me of : When a Snail Falls in Love & Love Me If You Dare ! I think it has the same feeling so if you find these 2 drama were good , then you should see this one for sure !!!!